Betelgeuse is NOT Collapsing, It’s Expanding

24 Friday Jan 2020

Posted by Paul Kiser in Astronomy, Exploration, History, Photography, Science, Space, Universities

Tags

astronomy, astrophysicist, astrophysics, Betelgeuse, Boyle's Law, Charles' Law, Combined and Ideal Gas Laws, constellation, contracting, expanding, Orion, stars, stellar collapse, supernova

Betelgeuse Collapsing? Think Again

The buzz about Betelgeuse is about its sudden and historic fainting (dimming.) Those who have a knowledge of the star and of supernovas have received the news with anticipation. Is this the great moment of Betelgeuse going supernova? Many people already know that immediately before the supernova, the progenitor star (the original star before a supernova) collapses in on itself. Betelgeuse is dramatically dimming, so it must be collapsing. Not true. Betelgeuse is expanding.

Dimming and Expanding Betelgeuse on 22 January 2020

Expanding Betelgeuse

Betelgeuse is dimming, but it is also cooling. Down approximately 100°K (180°F) in the past four months. This is an issue of physics. Temperature increases with increased pressure and the temperature decreases as the pressure decreases. The collapsing mass of a star increases pressure and temperature [¹SEE: Primer on Combined and Ideal Gas Laws below.] The expansion of a star would cause a decrease in temperature. Betelgeuse temperature is decreasing, therefore astronomers believe it is expanding, not collapsing.

…Betelgeuse is currently the coolest and least luminous yet observed. Since September 2019, the star’s temperature has decreased by ~100 K while its luminosity (inferred from the C-band/m-bol observations) has diminished by nearly 25%.

Edward F. Guinan and Richard J. Wasatonic
Posted in The Astronomer’s Telegram 20 January 2020

No Joy On A Neighborhood Supernova?

Does this mean that Betelgeuse is not about to go supernova? Nobody knows. This could be the last big push outward before the finale we’ve been anticipating. It could also be another step toward the end but not the last gasp of Betelgeuse.

Betelgeuse in the Orion constellation

It is unusual behavior and worthy of constant monitoring. This may be one part of the process that will help us understand the last days, weeks, months, and years of a supergiant red star. Stars don’t suddenly brighten or dim without reason and now we have the opportunity to discover something new and visibly intriguing about the process of a star’s death.

What’s happening? Something wonderful.

[¹Primer on Combined and Ideal Gas Laws ] $\qquad {\frac {P_{1}V_{1}}{T_{1}}}={\frac {P_{2}V_{2}}{T_{2}}}$ .]

Betelgeuse: Schrödinger’s Star

21 Tuesday Jan 2020

Posted by Paul Kiser in Astronomy, Communication, Ethics, Exploration, Higher Education, History, Honor, Internet, Journalism, Religion, Science, Space, Technology, Universities

≈ Leave a comment

Tags

AAVSO, American Association of Variable Star Observers, astronomy, astrophysicist, Betelgeuse, dimming, fainting, light year, math, mathematics, prediction, progenitor star, Schrödinger's cat, Schrödinger's star, Star, stars, supernova

Much Ado About Something

Some astronomers are taking a dim view of the fading light of Betelgeuse. Many are trying to dampen down reports of the star’s demise while not ruling out the possibility. The reality of science is that no one knows what is happening.

What are you doing, Betelgeuse?

A Funny Thing Happened On the Way to a Supernova

Betelgeuse is the hot topic in astronomy because it has been dramatically dimming or ‘fainting’ [SEE Graph 1.0.] In a period of three months, it has dropped from being the eleventh brightest star in the night sky to the twenty-third brightest. This fainting spell is significant because when a star goes supernova it rapidly collapses prior to the event.

Astronomers Edward Guinan, Richard Wasatonic (Villanova University,) and Thomas Calderwood (AAVSO) posted a notice on December 8th of the fainting of Betelgeuse that helped raise awareness of the event. The news media became aware of it and by late December the fainting of Betelgeuse was trending in public speculation of a spectacular doom for Betelgeuse.

Graph 1.0 – Betelgeuse fainting is historic (2018 to current)

A 645-Year-Old Notice

Because of the distance between Earth and Betelgeuse, we wouldn’t know of a supernova event until approximately 645 years after it happens. Our first indication would likely be through a sudden increase in neutrinos. The visual confirmation would occur a few hours later.

If Betelgeuse has gone supernova within the past ≈645 years, then an astronomer could say that Betelgeuse has both gone supernova and has not gone supernova. The delay creates a Schrödinger’s cat scenario. The truth is unknowable.

But astronomers remind us that it may be 100,000 years of more until Betelgeuse makes a stellar spectacle of itself and then abruptly ends its role of marking Orion’s armpit. Their impreciseness of the future of the star is due to a lack of observations of the behavior of progenitor stars (stars that end their life as a supernova) in the years, months, weeks, and days just prior to a supernova.

Betelgeuse is the armpit of Orion

Why Don’t Astronomers Know?

It’s been over 400 years since a star in the Milky Way was observed after it went supernova. That event, like almost every other supernova observation, occurred after the star exploded. Rarely have astronomers been forewarned of an impending explosion and in those cases, the warning has been a matter of hours prior to the event.

To make an accurate prediction of a supernova, we must have data to create a theoretical model of behavior preceding the collapse of the star. The model must be created by using mathematical formulas based on observable data. Without the math, a prediction is just an opinion.

In science, “We don’t know,” is the motivation to discover the truth, even if the truth contradicts the desires and opinions of the majority. At the core of every legitimate scientist is an unwavering desire to offer facts and not mislead others. Astronomers can’t, and shouldn’t, attempt to predict a supernova. “We don’t know,” is the correct answer and the general public has to accept that answer.

Unfortunately, most humans don’t like not knowing. Religions like to give absolute answers to questions even if the answer is unknown or even if it is 100% wrong. A scientist and/or scholar is governed by a higher power of truth. For scientists, not knowing the answer is what makes the process discovery so satisfying.

The End of the Faint?

In the past week observations of the fainting of Betelgeuse have leveled off. This may indicate that Betelgeuse is about to begin increasing in brightness. It may also indicate the fainting is pausing, or it may indicate that there is no pause and next week astronomers will see a continued drop in brightness. No one knows.

Graph 2.0 – Is the dimming leveling off in mid-January? (OCT 2019 to current)

My Answer To the Question

I am not a scholar in the field of astronomy so I can state my opinion about the situation. My opinion is that at some time in the past 645 years, Betelgeuse has gone supernova…and it hasn’t.

You have to love Schrödinger.

Winter Solstice and It’s Impact on Humans

19 Thursday Dec 2019

≈ Leave a comment

Tags

Christmas, Earth tilt, religion, religious beliefs, religious celebrations, winter season, winter solstice

Winter Solstice: Annual Test of Survival

The northern hemisphere’s Winter Solstice has had a major impact on civilizations in Europe, Asia, and North America. Early humans on these continents felt the fear and uncertainty as days became shorter and cold limited the availability of food and other life-sustaining resources. Each year the question had to be asked: “Will we survive?”

‘High Noon’ at 39° North latitude in mid-December

Every year, the Sun’s daily crossing sank lower and lower in the southern sky until it slowed and then stopped sinking. After a few weeks, the arc of the Sun began to slowly rise, bringing longer days followed by warmer temperatures. Spring returned and food and resources became more plentiful.

It is easy to understand so many pagan rituals and celebrations in northern cultures occurred near the shortest day of the year. It is also easy to understand why many religions adopted or adapted the solstice pagan rituals as their own. Most notably Christmas was conveniently established on or near the same day as the Roman observances of the season.

…around the time of the winter solstice, Romans observed Juvenalia, a feast honoring the children of Rome…In addition, members of the upper classes often celebrated the birthday of Mithra, on December 25. Mithra was an ancient Persian [infant] god of light…

History.com 2017

December Winter Solstice: It’s a Upper North Thing

Winter Solstice of the northern hemisphere is a regional phenomenon. People who live between 25° north and 25° south latitude cannot be faulted for feeling that it is a non-event. Their length of day between Summer and Winter is relatively insignificant compared to the drastic changes experienced by people farther north.

For people in the southern hemisphere, our Winter Solstice is their Summer Solstice. In fact, the Earth is closest to the Sun in late December and early January so the dark, cold days of our Winter Solstice are completely contrary to everything they experience at that time of year.

Where the Winter Solstice Shaped Religion

Did the Winter Solstice Reinforce Religious Authority?

Europe and the Middle East civilizations would have felt the impact of the Winter season. Each year people would be faced with ever-worsening conditions, possibly creating life-threatening situations. People who had experienced many solstices may have become oracles of hope by predicting a return to longer days and warmer weather.

The wise predictors of the return of the longer days would have seemed mystical leading to dependence on their guidance in all matters of life. It would be understandable that people who had no concept of how Earth’s seasonal cycles might begin to see an older person as magical when they consistently predicted the end of the cold and shorter days.

Knowledge of the Winter Solstice, cycles of the Moon, and other astronomical cycles would give rise to religious followers who felt their lives might be dependent on the whims and good graces of deities. By the time these religious movements expanded to regions South of the 25th latitude, they were massive social organizations that offered meaning and explanations to life.

South American Cultures Largely Ignored the Solstices

It is noteworthy that Mayan, Incan, and Astec civilizations observed and followed the apparent movement of the Sun, Moon, planets, and stars; however, there was no corresponding celebration or significance to the Winter Solstice in either the northern or southern hemispheres. Astronomy was important in determining the best conditions for planting crops; however, that time was influenced by ideal weather conditions (rainy or dry seasons) rather than a time that would correspond to the Spring planting conditions in the northern hemisphere.

The Reason For the Season

Clearly the northern Winter Solstice does not have a worldwide impact; however, for cultures above 25° North latitude, it has been a vital observance. The Winter Solstice has provided hope and reassurance of better days to come. While northern religions largely ignore the Winter Solstice as having any connection to their winter traditions, there is no doubt that it is the origin of all religious rituals during this time of year.

Astrophysics Book Review – Space: 10 Things You Should Know

11 Friday Oct 2019

Posted by Paul Kiser in Astronomy, Book Review, Communication, Education, Entertainment, Exploration, Higher Education, Information Technology, Internet, NASA, Passionate People, Photography, Print Media, review, Science, Social Interactive Media (SIM), Space, Technology, Traditional Media, Universities, Women, Writing

≈ Leave a comment

Tags

astronomy, astrophysicist, astrophysics, Book, Book review, cosmologist, cosmology, galaxies, Milky Way galaxy, Science, Space, space exploration

Minding the Gap of Knowledge

Sharing the knowledge of scholars (e.g.; astrophysicists) with non-scholars is difficult. Astrophysics scholars have spent years obtain a foundational understanding of the dynamics of our universe that is not obviously known to the public. They also have a working knowledge of special terms, acronyms, and highly cited authors. This creates a chasm with scholars on one side, who are advancing human knowledge, and non-scholars on the other side, unaware of the progress and activities of those in the field.

As scholars tend to be focused on their work and the work of their peers, it is rare to have a scholar attempt to bridge the chasm and help non-scholars have access to the secrets that have been uncovered and the challenges to be overcome.

Dr. Becky Smethurst, astrophysics researcher, educator, YouTuber, and author

Dr. Rebecca Smethurst, or Dr. Becky as she is known on her YouTube channel, is one of those rare scholars who is diligently immersed in sharing new knowledge and discoveries in astrophysics with the public as she actively participates in furthering our understanding of it. In her new book, Space: 10 Things You Should Know, (2019) Dr. Smethurst continues to inform and enlighten us about what humans know and don’t know about the development of galaxies and the stars within them.

Review – Space: 10 Things You Should Know

Category: Nonfiction, Science, Non-Textbook

UK/Europe Release: 5 September 2019 by Seven Dials Publishing
North America Release: Summer 2020 by Ten Speed Press

Informative ★★★★★
Relevancy ★★★★★
Readability ★★★★☆
Half-Life ★★★☆☆
Expertise ★★★★★
Visuals ★☆☆☆☆

[Formats: Hardcover, Audio]

Dr. Smethurst has written multiple scholarly articles; however, this is her first book. It is a short, easy to read work of 10 chapters. Each chapter reveals information about our universe that may not be part of public awareness.

The book is written in conversational language, not scholar-speak. It provides a basic knowledge of what we know about the formation of the universe, galaxies, and planets (including the Earth.) Amateur astronomers likely know most of this information, but Dr. Smethurst provides nuggets of new information that make the book worthwhile to read.

She begins with a view of how gravity is critical to how the universe functions. Because her work deals with supermassive black holes, Dr. Smethurst discusses what we know about black holes and theories of how supermassive black holes impact the galaxy they’re located in.

Dr. Becky also discusses Dark Matter, why scientists believe it is real, and what it means in the grand scheme of the universe. Two other chapters talk about the hunt for planets outside of our solar system and the practicality and current limitations of human space travel.

This book could serve as a unit in a middle or high school science class, but it is just as functional as a broad-based survey of current astrophysics knowledge for adults who can read above a sixth-grade level. As a first book by a doctorate level scholar for consumption by the general public, it is brilliant.

As one might expect with a book of this nature, the subject matter is fleeting. As Dr. Smethurst states in her preface, “…science moves quickly…” Though this is not a textbook, it encounters the same problem of most textbooks in that research and discovery moves on while the printed book remains unchanged.

My projection is that the half-life of this is about seven to ten years. After that, about half of the information will become less relevant as new discoveries push astrophysics forward. That said, this book is certainly not a wasted effort and the need to persevere with updated information is critical.

If this book were a second or third book by this author I would expect to see a more expansive book and more visually stimulating. Both Carl Sagan and Brian Cox have used television and print to ignite a passion for science in the minds of the public. Their books are filled with images that help the reader to see science as a living entity filled with wonder and adventure.

Dr. Becky uses imagery extensively on her YouTube channel so it is likely that we can expect future books to have a greater visual element.

Still, as a first book, coupled with her YouTube work, Dr. Smethurst has built an impressive bridge to reach out to the public. As an active researcher, she offers a unique opportunity for non-scholars to access scientific information from a knowledgeable source rather than the entertainment-based news media.

Dr. Rebecca Smethurst is the one to keep a telescopic eye on.

Dr. Becky’s Astrophysics Work

Understanding The Life and Times of a Galaxy

In the last 100 years, our ability to visualize the stars has vastly improved but the galaxies we see today have changed very little in the past 10,000 years. Changes in the shape and location of a galaxy take millions of years to occur so what astronomers see today isn’t that much different than what they could have seen thousands of years ago.

What astrophysicists do know is the relative age of a galaxy. When we image a galaxy that is ten million light-years away we are seeing how it looked ten million years ago. By using the relative age of a galaxy and the characteristics of that galaxy, astrophysicists can identify group traits of similar galaxies and begin to understand how galaxies develop and eventually die.

The work of Dr. Smethurst has been to increase our understanding of the role of a galaxy’s core black hole (supermassive black hole) in the development of a galaxy and of its ability to establish new generations of stars. The current theory is that as the galaxy matures the core supermassive black hole sucks much of the free hydrogen out of the galaxy. Without an adequate source of hydrogen, the fuel for the formation of new stars is depleted and the galaxy becomes inactive.

Dr. Smethurst’s Scholarly Astrophysics Linage

Dr. Smethurst’s advising faculty for her doctorate program was Dr. Chris Lintott. Since 2013, Dr. Lintott has been a co-presenter for the BBC’s enduring documentary astronomy television program, The Sky At Night and is a co-founder of Galaxy Zoo, an online crowdsourced project to engage the public in helping to categorize millions of galaxies for research purposes. Dr. Lintott’s advising faculty included the highly published and cited cosmologist Dr. Ofer Lahav.

Dr. Becky earned her Master’s degree in Physics with Astronomy at the University of Durham and her Doctorate degree in Astrophysics at the University of Oxford. Currently, she is a Junior Research Fellow at Christ Church College at Oxford University. Her focus is on studying galaxies and their interactions with their core supermassive black hole.

In 2014, [23 April 2014] Dr. Smethhurst was asked where she saw herself in five years. Her response was, “I’d look to reach the most amount of people as possible…to spread the word about the amazing things that people have no idea about.”

…to spread the word about the amazing things that people have no idea about…

Dr. Rebecca Smethurst – 23 April 2014

Now, five years later, Dr. Smethurst is achieving that goal through her new book, her YouTube channel, and her outreach work.

Dr. Becky Smethurst

Curriculum Vitae
Webpage

Dr. Becky on:

Twitter
SpaceTV
LinkedIn

Sample of co-authored published work:

Is Jupiter the Cause of the Solar Sunspot Cycle?

26 Tuesday Feb 2019

Posted by Paul Kiser in 1968, Astronomy, Eclipse, NASA, Science, solar, Space

≈ Leave a comment

Tags

astronomy, electromagnetic radiation, gravity, Jupiter, Jupiter Solar Cycle Precession, orbit, Solar Cycle, solar maximum, Solar Minimum

A Strange Coincidence

About every eleven years the Sun completes a sunspot cycle. Every 11.9 years Jupiter completes its orbit of the Sun. Coincidence? Maybe, but there is compelling evidence to suggest that Jupiter and the sunspot cycle are linked.

Image 1.0 Sunspots at the beginning of the 2017 Total Solar Eclipse

The Solar Sunspot Cycle

The solar maximum (the period when the Sun has the maximum sunspot count) of last six cycles occurred in 2012, 2001, 1990, 1979, 1968, and 1957. In each case, the solar maximum extended over many months, but by selecting a common date within the period, (e.g.; June 1st,) the eleven year period becomes apparent (SEE Graphic 1.0)

Graphic 1.0 The Eleven-Year Solar Cycle using a Common Date (June 1st)

It is important to note that the eleven-year cycle applies to the maximum sunspot activity. Solar minimums tend to vary significantly from cycle to cycle; however, solar maximum activity is usually reliable within plus or minus six months.

Jupiter’s Solar Cycle Precession

The question is, where is Jupiter in relation to the Sun during the solar maximums? The answer is simple. For the last six solar maximum cycles, Jupiter has been approximately twenty-five degrees (25°) further back in its orbit than the previous solar maximum.

Graphic 2.0 The position of Jupiter in its Orbit for the Recent Solar Maximum Cycles and the upcoming cycle (Planets reflect orbital positions for 25 FEB 2019)

The idea of a connection between Jupiter’s orbit and the solar cycle has been traditionally scoffed at by astrophysicists; however, as more is understood about the dynamics of the Sun’s influence beyond the visible solar atmosphere, scientists are less eager to ignore the possibility. A 2016 German study suggests Jupiter, Venus, and Earth may all play a role in sunspot activity.

If there is a connection between the position of Jupiter and the solar maximum, it raises the question of why? Is it a gravitational link, or is it an electromagnetic link? Why does the solar maximum occur when Jupiter is approximately 25° further behind its position of the last solar maximum? Answers to these questions will certainly lead to more questions.

The answers may come soon. In the meantime, Jupiter is raising some interesting questions.

Equinox Does NOT Mean Equal Day and Night

20 Thursday Sep 2018

Posted by Paul Kiser in Astronomy, Life, Panama, Reno, Science, Space

≈ Leave a comment

Tags

Autumnal Equinox, Equinox

The Myths of the Equinox

This Saturday at 6:54 pm PDT the Sun will be directly over the Equator. Geographically, the event will occur over the western Pacific Ocean, north of Papua New Guinea (≅149° east longitude.) It is the Autumnal Equinox and it is the moment that summer ends and winter begins…in the northern hemisphere. In the southern hemisphere, the equinox is the end of winter and beginning of spring.

Equinoxes are ripe with myths, but probably the most common myth is that an equinox is a date of an equal day (12 hours) and night (12 hours.) It is a myth established by those who live in the mid-latitudes because, on the day of the equinox, the day and night are approximately equal. Near the equator, the length of day and night are nearly the same year-round, so the equinox has no significance.

Equal Day/Night is About Location, Location, Location

Near the equator, day and night are almost equal the entire year; however, the closer one is to either pole, the length of the day increases to the point that there is no night on the equinox. Most locations away from the poles do have a date when day and night are approximately equal, but that rarely occurs on the equinox.

In Panama City, Panama, October 6, 2018, is the date when day and night are equal. In Reno, Nevada, USA, the date is September 25th. In New York City, NY, USA the date is September 26th. In São Paulo, Brasil it is September 17th. The date occurs near the equinox, but the exact date varies depending on location.

Finding East and West on the Equinox

What is true about the equinox? The equinox is the date that an observer can determine true east and true west from her or his location if she or he has an unobstructed view of the sunrise and sunset. Why this happens is complicated, but the point on the horizon where the Sun rises is true east and where it sets is true west.

Don’t get me started about balancing an egg. Eggs are for eating regardless of the date…and that’s about it.

Our Roving Intelligent Life On Mars

31 Saturday Mar 2018

Posted by Paul Kiser in All Rights Reserved, Astronomy, China, Communism, Exploration, Government, History, Life, Mars, NASA, Photography, Pride, Science, Soviet Russia, Space, Technology, United States, US History, US Space Program, Vladimir Putin

≈ Leave a comment

Tags

China, Curiosity, ESA, intelligent life, Joint Propulsion Laboratory, JPL, life, Mars, NASA, Pathfinder, Rovers, roving, Russia, Russia Space Program, Sojourner, Soviet Russia

For over 2000 Mars-days* the Curiosity Rover has been strolling across the landscape of Mars. The Mission is known as the Mars Science Laboratory and the star is Curiousity. Google defines intelligence as, “the ability to acquire and apply knowledge and skills.” Under that definition, Curiosity and its predessors certainly qualify as intelligent life on another planet.

[*Mars-day or sols = 24 hours + 37 minutes of Earth time]

Mars = Soviet Humiliation

To date, humans have attempted to send 55¹ missions to Mars and over half of them have failed. Soviet Russia tried to launch 20 missions and none of them were a complete success. Two misssion were mostly successful, and three of them were mostly failures. The other 15 missions were complete failures.

Russia seemed to give up sending missions to Mars after 1988. Since the fall of Communism, Russia has attempted two probes, both failed. Russia’s only successful probe to the Red planet is a joint orbiter mission with the European Space Agency (ESA) that is still in operation.

In comparison to Russia’s single success out of 23 attempts, India has sent one mission to Mars and the orbiter is now on an extended mission.

[¹NOTE: An orbiter/lander mission is counted as two separate missions.]

What We Know About Mars, Thank NASA/JPL

NASA and its partners like the Joint Propulsion Lab (JPL) have been responsible for putting intelligent life on Mars. Five out of the current eight operational missions are NASA/JPL missions. The Mars Odyssey mission was launched 17 years ago (April 2001) and is expected to be operational until 2025.

The United States is the only country to successfully have a rover on Mars and it has a perfect record in four attempts (Sojourner, Spirit, Opportunity, and Curiosity.) The Opportunity rover was launched in 2003 and is still operational.

Curiosity takes a selfie on Mars

Curiouser and Couriouser

The Couriosity rover was on a two-year mission after its successful 2012 landing. It is now on an extended mission without an end date. It continues to explore and offer new insights; however, it is a mission that has almost been too successful. As it continues to wander around Gale crater, one has to wonder how much more can our rover-on-the-ground learn in one location?

As it rolls beyond 2000 sols will its constant poking, prodding, and picture-taking result in more knowledge, or bias our understanding based on the massive data from one region? Perhaps we will find out in 2020. Three new rovers are scheduled for launch that year. The United States will send Mars 2020, ESA will send ExoMars 2020, and the yet to be named 2020 Chinese Mars Mission will also be sent.

Falling Sky: China’s Tiangong 1 Space Station Last Hours

28 Wednesday Mar 2018

≈ Leave a comment

Tags

atmosphere, China, Chinese Space Agency, deorbit, ISS, orbit, Skylab, Space Station, Tiangong 1

Within the next 72 hours China’s first space station, the Tiangong 1, is going to end its life. It is already scraping the extreme upper atmosphere of Earth and the air resistance is slowing down the 7.7 metric tons (8.5 ton) spacecraft with every passing second. It is coming down somewhere, but scientists don’t know exactly when or where.

The rapid altitude decline (in km) of Tiangong 1

Current Stats of Tiangong 1

The current speed of the Tiangong 1 (27 March 2018 at 12 noon PDT) is at 28,000 km/hr (17,400 mph) and it is at an altitude of just under 200 km (125 mi) at the lowest point in its orbit. Its orbit has lowered by over 60 km in the last two months. As Tiangong 1 approaches 160 km the air resistance will be too much for it to maintain orbit.

Statistically, Tiangong 1 will most likely fall into an ocean; however, there is a possibility that it could fall on southern Europe, southern Asia, Africa, Austrailia, South America, Central America, or the United States.

Lost Contact

Normally, objects like this are brought down in a controlled fall using thrusters to slow the craft down at a specific time and location. In the case of Tiangong 1, the Chinese engineers had planned to bring it down in a controlled reentry until they mysteriously lost contact with it two years ago.

China said they had shut down telemetry with Tiangong 1 in March of 2016. They didn’t admit they had lost control of it until amateur astronomers had confirmed the space station was tumbling in space a few months later. Without the ability to communicate with the space station, there is no way to command the thrusters for a controlled reentry.

Best Guess?

The experts are currently estimating that Tiangong 1 will come down on Easter Sunday (1 April.) Since Earth’s atmosphere expands and contracts with solar activity, the air resistance is not consistent. There is a critical point when the air resistance will win its battle with the space station and the orbit will decay exponentially. At that point, the spacecraft will begin a rapid breakup as it descends through the thicker atmosphere.

For what it’s worth, my guess is 7:42 am PDT on Saturday, 31 March.

Ten Reasons There is Life on Earth

21 Wednesday Mar 2018

≈ Leave a comment

Tags

axial tilt, conditions for life, Earth, exoplanets, Goldilocks Zone, habitability, habitable planets, life, life on earth, Milky Way galaxy, Moon, planet, planets, Sun, temperature, water

As scientists are finding more planets orbiting other stars it is becoming more of a reality that we are not alone in the universe. We may never be able to contact or observe life on other planets, but no one can deny the possibility that life might take root these islands in space. Still, it is important to remember that life on Earth is due to special circumstances.

Ten Factors Required For Life On Earth

A planet orbiting a star does not necessarily result in the development of life. On our planet, we have at least ten factors that allowed life to develop.

1. Not Too Close to Other Stars (Location, location, location)

If our solar system was located near the center of the Milky Way Galaxy, life probably would not have been able to develop on Earth. Stars are dangerous. They do bad things including spitting out radiation that destroys the basic structures of complex life. A planet in a solar system with other stars in the neighborhood is asking for trouble.

2. Our Sun is Special

Life on any planet requires a star, but not just any star will do. Size matters in the development of life. So do the qualities of the star. Our Sun is bigger than most, but still it is a relatively small, stable star and it’s been that way for over four and a half billion years. It will be stable for about another 5 billion years. It also has a treasure of heavy elements that are necessary for planet formation. Without planets, there is no life.

Life around stars of different sizes are possible, but our Sun seems to be about the perfect size for the development of life. In addition, our Sun is 85% brighter than the rest of the stars in the Milky Way, which has been vital in ‘powering’ our planet.

3. A Star’s Habitable Zone

Planet hunters and the media have made a major issue out of the concept of the ‘Goldilocks Zone.’ This is the area around a Sun where a planet is not too close, nor too far away. It is an important aspect of the potential for development of life on a planet, but it is only one factor of many. For Earth, we are resting in the orbit that is just right.

4. Moon

It’s hard to overstate the importance of the Moon for the development of life on Earth. First, the Moon was likely formed in a collision when a small planet-sized object hit Earth and tilted our axis (more on this later.) In addition, the Moon has slowed the Earth’s rotation down (more on this later,) and helped enhance the tidal movement of the Earth’s oceans. The Moon has played an important role in human activity, but just as an important role for all our planet’s species.

5. Size of the Planet

Again, size matters. If a planet is too big and the gravity will inhibit the formation of larger, more complex molecular organic structures. Too small and there can be no atmosphere. Earth is in the zone.

6. Axial Tilt

If Earth’s axis was perpendicular to the plane of the solar system the Sun would heat up the equator creating a zone too hot for most life forms. The poles would have minimal solar heating and would be extremely cold. In between would be the combat zone between hot and cold. Constant violent storms and wind would batter the mid-latitudes.

The tilt of the Earth causes solar heating to warm one hemisphere and allows the other to cool down. Every six months the warm/cool cycle swaps hemispheres. This creates storm systems in both hemispheres, but they act to distribute the warmth more evenly. The tilt of Earth’s axis is almost perfect for nurturing life.

7. Length of Day (spin)

We take the 24 hour day for granted. We shouldn’t. Last year Takanori Sasaki, a planetary scientist with Kyoto University, pointed out that the Earth originally spun so fast that its ‘day’ was only four hours long. Multicellular life didn’t develop on Earth until the day was 23 hours long. It’s is not clear at what point a planet’s rotation makes it habitable, but it seems obvious that a planet’s spin is a factor in the possibility of life formation.

8. Atmosphere

It may be obvious that an atmosphere is required for the development of life, but there are qualities to an atmosphere that are also required. The atmosphere cannot be too thick or too thin. It has to consist of an oxidizer, such as oxygen, to promote chemical reactions in cell structures. There is more to Earth’s air than just air.

9. Liquid Water

Water is necessary for all life that we are aware of, even though it is more important to some species than others. Liquid water is even more important to life than water vapor or ice. It is not an accident that the development of life happened on a planet where 71% of the surface is covered with liquid water.

10. Continent to Ocean Ratio

It’s not obvious, but life on Earth has been helped by the ratio of land to ocean. Land tends to have more temperature variance than the oceans between summer and winter. Land that is not covered in ice or vegetation absorbs much more heat in the summer. If most of our planet consisted of continents, the temperature change from summer to winter would be more dramatic, and less friendly to life.

Earth is Unique, Not Rare

Life on Earth was not an accident, nor is it divine. The conditions that led to the development of life here must exist on millions of planets, but there are an estimated 100 billion planets in the Milky Way Galaxy alone. We are unique, but we cannot be alone. Give life an opportunity and it will seize it.

First Day of Spring is Fake News

20 Tuesday Mar 2018

≈ 1 Comment

Tags

cold, fake news, first day of Spring, northern hemisphere, Spring, tornados, Vernal Equinox, warm air, Weather, weather people, winter

Today at 9:15 am Pacific Daylight Time (PDT) the Sun will be directly over the equator. For this reason, the news media will relentlessly remind us that Spring is here. They will tell us it is the return of warm weather! Yea! But, don’t be fooled by their fake news.

Springtime in the Northern Hemisphere. Bah!

You Call This Spring?

The Vernal equinox may be the date that the Sun comes back over to our side of the equator, but let’s be real, warm weather doesn’t rush back the northern hemisphere. At least not to those over 35° north latitude. Some of us will be lucky to see our shadow on the first day of Spring. Forget about the stupid groundhog that never, ever is correct.

The northern hemisphere will continue to be smothered in cold air masses and bring snow down across much of the lower 48 states. (Don’t get smug Hawai’i. You can have snowstorms after the Vernal equinox, too. You just have to climb a really tall volcano to get to it.) The media calls them ‘Spring snowstorms’ as if that is supposed to make us feel better about them. News flash: It doesn’t.

And don’t get me started on those people who like to slip down a snow-covered slope while trying to stand on bent slats of fiberglass. They are all smiles when a new storm dumps more solid water in the mountains. After the third week in March, skiing and snowboarding should be done on ice and melting snow, as God intended. None of this ‘fresh powder’ crap.

Spring Reality Check

For the next three months, the axis tilt of the Earth will increasingly favor the Sun in the northern hemisphere. For those of us that are done with cold weather, we have to remember that warm and cold are like new lovers can’t get enough of each other.

As the lower latitudes of the northern hemisphere heat up, the cold air in the higher latitudes rushes down to embrace the warmth. Tornados in northern Florida are an indication that the Sun is heating up the northern hemisphere and the winter cold is rushing down to meet it. As we move from March to April to May to June, tornados will show up farther and farther north.

The Script

News media will still try to convince us that the weather significantly changes on 20 March. I’ve stolen an advance copy of the script that is to be used by local television weather people across the northern United States:

Weatherperson:

(Try to sound homey) Well, it looks like Spring is here, but we still have some Spring snowstorms hanging around for the next few days, weeks, or possibly months. These storms are Spring storms so the temperature will be one half a degree warmer than during the Winter. We should see only a trace of snow, up to two meters if your house is located within the area of snowfall. It will quickly melt off in May, so get out there and enjoy the Spring weather!

Why Are There 360 Degrees in a Circle?

19 Monday Mar 2018

≈ Leave a comment

Tags

360°, astronomy, Base 60 Babylonians, circles, degrees, Greeks, math, mathematicians, metric, orbit, year

Everyone knows there are 360 degrees in a circle. Why? A circle could have a 1,000° which would make a half circle equal 500° and a quarter circle 250°. Who chose the number 360? Was there a vote? Who do we blame? Inquiring minds want to know!

2017 Total Solar Eclipse from Canyon City, OR

As it turns out there are at least two reasons we use 360° as the number to define a complete circle. One reason has to do with astronomy and the other with mathematics.

360 Degrees? Blame the Babylonians

The Greeks are partly responsible for defining the numerical value for a circle, but really it was the Babylonians. It may even be farther back than the Babylonians, but someone erased their hard drive and now we will never know.

Apparently, the Babylonians loved the number ’60.’ They created a number system using Base 60 (we use Base 10.) The number 60 is amazing because it can be divided into so many factors. 60 can be divided evenly by 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. Since the Babylonians loved 60, the fact that a circle can be divided into six equilateral triangles made 360 the best option for defining the numerical value of a circle.

We don’t actually know if it was the Babylonians, but we do know that several prominent Greek mathematicians used 360° as the numerical value for a circle. It is written…in Greek of course.

Star Gazers In a 360 Days

But long before the Babylonians, it was obvious to anyone who looked up at the sky at night that the stars followed a circular pattern through the year. If one noted the position of a star or constellation on a particular night and time, next year that star would be in the same place on the same day and time.

The elapsed number of nights for a full circle? About 360. Anyone who tracked the stars would have noted that the circular pattern of the stars resumed after about 360 days.

The reason we have 360° is most likely because of the speed at which the Earth rotates, (once every 24 hours,) and there are approximately 360 rotations (days) in a year.

Metric Circles?

Believe it or not, there were attempts to make circles metric. It didn’t take. There are some uses for it, but the 360° value is more accepted ‘around’ (that’s a joke) the world.

The Ides of March is Really About the Moon

15 Thursday Mar 2018

≈ Leave a comment

Tags

15th, Antony, calendar, Full Moon, Half Moon, ides, ides of March, Julius Caesar, kalends, month, New Moon, nones, Octavius, Roman, Rome, Senate, William Shakespeare, year

Thanks to William Shakespeare, the Ides of March is associated with the assassination of Julius Caesar (15 March 44 B.C.) Most people know the Ides of March to be on the 15th. The Ides of a month is often referred to as the middle of the month, which is true, but there is more. The Ides of March is about the Moon, not Caesar.

The Greek and early Roman calendar: New Moon began each month (kalends) and the Full Moon was the middle (ides)

The Growing Pains of the Months and Years Concept

The concept of a month and a year was in a transitional phase during the rule of the Romans. Early calendars simply followed the phases of the Moon. A New Moon started each month and the Full Moon was the middle. This meant that the cycle of the seasons and the months were not in synch.

Each month included three reference points associated with the phases of the Moon. They were the kalends (New Moon), nones (first half Moon,) and ides (Full Moon.) Every other day of the month was a number based on how long before the next named phase of the Moon (March 12 would be ‘3 days before ides.’)

However, there were only ten months in a year so they added Winter as an unnamed time period between the years to match the Spring, Summer, and Autumn. The New Moon prior to the Vernal Equinox would begin the new year. March was the first month of a new year and celebrations were held between the kalends and ides of March. For example, in 2018 the New Year (kalends of March) would be 17 March so the ides of March would be 31 March.

Back to J.C. …Julius Caesar

Cavete Idibus Martiis

Beware the Ides of March (in Latin)

The situation of Caesar’s death is interesting considering the current political environment of the United States. Caesar had won the support of the lower Roman classes and was named dictator for life. His assassination threatened the rise of a civil war led by the lower class. Antony used this threat in an attempt to take Julius Caesar’s place, but Caesar had named his 18-year-old son, Octavius, as his successor. In the end, the conspirators in the Senate were all killed and Octavius ruled Rome.

Time To Stop Changing Time? Why We Need Daylight Saving Time All Year

11 Sunday Mar 2018

Posted by Paul Kiser in About Reno, Aging, All Rights Reserved, Astronomy, Daylight Saving Time, Economy, Generational, Government, habits, Health, History, Lessons of Life, Mental Health, Recreation, Reno, Science, solar, Space, Technology, Travel, United States, US History

≈ Leave a comment

Tags

clock, Daylight Saving Time, DST, Standard Time, time change, Year Round

Many people dislike the two days of the year we go to or revert from Daylight Saving Time (DST.) It requires changing the clocks and adjusting to the new rhythm of our activity related to the rise and set of the Sun. It is annoying and, as a species, annoyance is a prompt for finding a solution. Perhaps it is time to stop changing time.

A Problem of Degrees

We should recognize that the length of day is only an issue for those living between 30° and 70° latitude. The length of day within 30° of the equator doesn’t radically change from summer to winter. Above 70° latitude, the Sun sets for weeks or months during the winter and there are not many people living that close to the poles.

For those living between 30° and 70° latitude, there is an undeniable problem. Reno, Nevada, USA is at 39° north latitude. At the summer solstice, the day is almost 15 hours long and sunrise is at 5:30 am under Daylight Saving Time. If we did not have DST, the sun would rise at 4:30 am.

A Diurnal Vespertine-Adapted Species

In an agrarian economy, working in the field is easier during daylight hours. In that situation, time is relative to a solar schedule; however, in an interactive urban economy, working in shops and offices is more suitable for a common clock schedule.

After artificial electric light became the standard, and after the population moved into cities, we became a diurnal, vespertine-adapted species. Most of our country’s population works during the daylight hours and participates in non-work activities in the evenings. Today, most people are not active before six in the morning, but they remain active until 10 pm or later.

Sunrise before 6 am disturbs the typical sleep patterns of humans, and light later into the evening is more suitable for evening activities. Daylight Saving Time creates a favorable environment for a later sunrise and more sun in the evening.

Daylight Saving Time Year Round

Standard Time was traditionally based on the position of the Sun at High Noon. That approximately divided the daylight into Morning and Afternoon. We no longer use High Noon as the foundation of Standard Time; however, it is an artifact of a primarily agrarian economy. Daylight Saving Time was used to adapt the clock to human behavior as we moved from the farms to more urban living.

Time is a human invention. It should serve the needs of humans. It would seem it is time to stop punishing humans with Standard Time and remain on Daylight Savings Time for the entire year.

Magnetic Pole Reversal: Will It Turn Our World Upside Down?

10 Saturday Mar 2018

Posted by Paul Kiser in Astronomy, Education, Exploration, Generational, History, NASA, Science, solar, Space, Technology, US Space Program

≈ Leave a comment

Tags

cosmic radiation, cosmic rays, Curious Droid, Earth, flip, Liquid core, magnetic pole reversal, magnetic poles, North Pole reversal, solar radiation, South Pole reversal, sunspot cycle, sunspot maximum, sunspot minimum, swap

The magnetic north and south poles are up to something. It looks like Earth’s magnetic poles are about to swap. It usually happens every 300,000 years or so but it’s been 780,000 years since it last happened. What does it mean for humans? Is this the end of human civilization?

Earth magnetic normal magnetic field (left) and during a swap (right)

Pole Reversal: Another Y2K?

To answer this question let’s go back to 1984. That is the year that Jerome and Marilyn Murray published a book called Computers in Crisis, changed to The Year 2000 Computing Crisis in 1996. They laid out a problem of computer code that handled dates using only the last two digits of the year. The crisis was that at the moment the year 2000 began, they said all the computer networks around the world would crash. This was known as the Y2K problem.

The Y2K problem was a significant issue; however, because computer codes are constantly being changed, updated, and replaced, it probably would have been resolved without the hyper-scare stories in the media. Computer codes were changed and Y2K came and passed without incident.

That Y2K problem is a good comparison to the North/South magnetic pole reversal issue. There is a problem, but it is a problem that will unfold over hundreds to thousands of years. Most will not notice the effect in the next decade, but there is a significant change coming as soon as the next solar minimum.

Your Magnetic Field is Temporarily Out of Order

The problem is not about the reversal of the magnetic poles. The problem is about the process of the reversal. The magnetic field around Earth deflects cosmic and solar radiation from reaching Earth’s surface. Without this field (or shield) life, as we know it on Earth, would not be possible.

As the poles begin the process of swapping the magnetic field it becomes less organized. This results in the magnetic north and south pole fading and that causes cosmic radiation to come closer to Earth’s surface.

In addition, the magnetic field becomes weaker during solar sunspot minimums. This is when the Sun has few, if any, sunspots and generates less solar flares. This lull in solar activity approximately every eleven years is matched with a similar lull in the strength of Earth’s magnetic field.

Captain! Our Shields Are Down!

Scientists have discovered that the magnetic field is weakening much faster now than in the past. They believe the process of pole reversal, which is overdue by about 400,000 years, has now begun. We are also in the beginning stages of the solar minimum, which will result in an anemic magnetic field for the next two to three years.

Projections of the radiation dosage for this upcoming solar minimum were about 20% above the last solar minimum; however, actual rates are closer to 30% so far. This is not a major concern, but it does mean that satellites may encounter more radiation that could damage or disable them. It also means that an astronaut only can spend about 700 days in space now than the 1,000 days they could spend in the 1990’s.

Oh Where, Oh Where Will Our North Pole Go?

The poles are on the move thanks to a liquid layer of iron in Earth’s Core. Earth is already experiencing a strange phenomenon of magnetic weakening across the South Atlantic stretching from Africa to South America. Since we have not experienced this change before, no one can be absolutely sure what odd side effects may occur during the process; however, the only significant concern is increased radiation in Earth’s atmosphere and in orbit.

It’s important to remember that in geologic time frames we are the equivalent of lightning. As problems develop we’re pretty good at responding.

Is There a Planet Nine or Not?

03 Saturday Mar 2018

Posted by Paul Kiser in Astronomy, Exploration, NASA, Science, solar, Space, Technology, US Space Program

≈ 1 Comment

Tags

ecliptic, ninth planet, orbit, Planet Nine, solar plane, solar system, Sun, trans-Neptunian objects

Is there a Planet Nine in our solar system? After Pluto got kicked out of the planet club most of us woke up to the reality that there were only eight planets. There was no reason to believe that some mysterious Planet Nine out there that met the requirements of the club. We would have seen by now, correct?

Planet Nine and other orbits looking from above the solar ecliptic

Nothing New In Planet Discovery

All the planets except Uranus and Neptune were discovered by Babylonian astronomers, although the six innermost planets were most likely noted by humans before writing was invented. Uranus was discovered in 1781, and Neptune was found in 1846. Despite all the advances in telescopes and space exploration no other ‘planet’ has been discovered in our solar system. So, why would anyone think another planet might exist?

Odd Ducks Out There

If the Sun and the planets were formed from a disk of debris, then most objects would be aligned in that disk or solar ecliptic plane, or the plane that the major planets are on as they orbit the Sun. Collisions between asteroids can send them off in unusual orbits that don’t align with the solar ecliptic.

However, there are a group of objects beyond Neptune that have unusual orbits. These objects are called trans-Neptunian objects. These are on a different plane and defy easy explanation. In addition, the Sun itself is a bit odd in its rotation. The Sun seems to rotate slightly off the ecliptic plane that all the planets follow.

Doing the Math

Two astronomers, Chad Trujillo and Scott S. Sheppard, tackled the odd orbits of the trans-Neptunian objects and discovered that some of the orbits of the objects could be explained if there were a large planet farther out in the solar system. That didn’t sit well with other astronomers so they decided to prove them wrong.

Planet Nine’s likely orbit and the orbits of trans-Neptunian objects

Konstantin Batygin and Michael E. Brown from CalTech decided to re-do the calculations of Trujillo and Shepard. They eliminated some of the objects studied because they might be influenced by Neptune’s gravity. That left six objects to study. To their surprise, they discovered that a planet ten times the size of Earth in an off-plane orbit much farther out than Neptune explained the orbits of the six objects to a 99% degree of certainty.

Is There a Ninth Planet?

Despite the mathematical support, there is no Planet Nine…yet. An analogy would be that if someone picked a date ten years in the future, say 3 March 2028, and was asked if that day would fall on a weekday. Without a calendar to look at it would be hard to say ‘yes’ or ‘no.’ It is very likely, but it is not certain until there is proof.

We currently have no proof of another planet, and spotting Planet Nine will be difficult at best. It would be a relatively small target with almost no sunlight reflecting off of it. It couldn’t be seen with today’s telescopes in either the visible or infrared spectrums. Even if we could determine where it is in its orbit, it would take a probe as many as twenty years to get into the Planet Nine neighborhood.

So the answer remains ‘no.’ There is no Planet Nine…but stay tuned.

Five ‘Facts’ About the Equinox?

24 Saturday Feb 2018

Posted by Paul Kiser in Astronomy, Random, Science, solar, Space, United States

≈ Leave a comment

Tags

2018, Autumnal Equinox, balancing an egg, Equinox, facts, March, no shadow, north pole, south pole, Spring, Vernal Equinox

At 9:15 am PDT on the 20th of March, we will reach the Spring Equinox, or more correctly, the Vernal Equinox. People in the northern hemisphere refer to this as the beginning of Spring. It is also referred to as:

the date when day and night are equal
the date when the Sun shines on both the North Pole and the South Pole
the date when the Sun rises exactly East and sets exactly West at every location on the Earth
the date you can balance an egg on its end
the date you won’t cast a shadow.

Two of these ‘facts’ are false, one is “well, sort of,” fact, one is “mostly true,” and one is true.

Timelapse From Space: Seasonal Progression of Sunlight on Earth

The Date of Equal Day and Night?

Nope. While the length of day and night are almost equal on the day of the Vernal Equinox, it’s not actually true unless you’re closer to the North or South Pole. At the poles and the farther away from the poles, the less this is true.

For example, in Longyearbyen, Svalbard, Norway, in the Arctic Circle, in 2018 the date that comes closest to being equal in day and night hours is the 19th of March (day = 11:58:51 hours long.) In Reno, Nevada, USA, the date day and night are almost equal is the 16th of March (day = 11:59:28 hours long.) In Sydney, Austrailia that date is the 24th of March (day = 12:00:38 hours long.) In Bogata, Columbia it was the 21st of February (day = 11:59:59 hours long.)

The Date the Sun Shines on Both Poles?

Yes, and on the North Pole, it spirals up from the horizon, around the viewer until the Summer Solstice when it begins to spiral downward, setting after the Autumnal Equinox in the Fall. The same is true for the South Pole, only the Sun rises at the Autumnal Equinox and sets after the Vernal Equinox.

Sunrise on the South Pole

The Date the Sun Rises Dead East and Sets Dead West?

Mostly true. Its explanation makes my head hurt, but I’ve been able to use pencils on a globe on its axis with a single light source to prove it to myself. You can read multiple descriptions on the Internet but have pain reliever at the ready.

However, there’s a catch. The viewer has to have an unobstructed view of the horizon and be near or at sea level. The Sun’s trajectory is at an angle compared to the horizon and if the view of the true horizon is blocked the Sun will appear to rise or set at a location that is off from true East or West.

The Date You Can Balance an Egg On Its End?

Long proven to be false…and stupid at the same time.

The Date of No Shadows?

Sort of true, but only if you’re on the equator at exactly high noon. Not many people want to do that…it’s hot at the equator. Who wants to stand out in the Sun at noon just to NOT see your shadow? Besides, the people who might want to do that are still trying to balance an egg on its end.

Center of the Milky Way: Update

20 Tuesday Feb 2018

Posted by Paul Kiser in Astronomy, Exploration, Generational, NASA, Photography, Science, Space, US Space Program

≈ Leave a comment

Tags

Albert Einstein, astronomy, black hole, center of the galaxy, gravity, infrared, Milky Way galaxy, orbits, radio waves, S2, Sagittarius A, space dust, Star, stars, supermassive black hole

During the history of humankind, we have looked up and stared at the center of our galaxy. Most of that time we created stories about it, but now we know some of the facts. If you’re not a space geek, astronomer, or science nut, you may not know what new information has been discovered about the center of the Milky Way. A lot of information has been learned in the course of our lifetime, even if you are only 16 years old.

The Milky Way Galaxy…as it was 26,000 years ago

Dust in the Wind

To see the Milky Way Galaxy requires getting away from bright city lights on a clear night. It looks like a faint cloud running across the sky at an odd angle. What a person sees is light that has traveled from the center of our galaxy for about 26,000 years. Some of those stars are gone, and new stars have formed.

What you may not know is the dim light coming from the central bulge at the center would be brighter than the full Moon if it weren’t for space dust. Near the center of the Milky Way are over ten million stars. If there were no dust we would just see a dazzling glow from the central bulge.

The Story of Black Holes

Our understanding of the Milky Way has coincided with our awareness and understanding of black holes in space. The idea of a black hole was first suggested in a letter by John Michell published in November 1784. The work of Albert Einstein on general relativity led to theoretical work confirming the mathematical possibility of black holes during the first half of the 20th century.

However, the first prospective black hole wasn’t discovered until 1971. At this point, no one suspected that the centers of all galaxies were black holes. It would be 2002 before Max Planck Institute for Extraterrestrial Physics in Germany would produce evidence that a black hole was at the center of the Milky Way Galaxy.

What You Can’t See

The problems with determining a potential black hole are that, 1) as mentioned before, there is too much dust between Earth and the center of the Milky Way galaxy and, 2) a black hole doesn’t emit light. The first problem is solvable by using different wavelengths of radiation other than visible light. Gamma, infrared, and radio waves pass through space dust and allow astronomers to see their source.

The second problem in revealing a black hole is not what they are, but what they do. What black holes do best is produce the pull of gravity. Their gravitational effect is so strong that stars orbit black holes…before they are eaten by it. All astronomers had to do is find an invisible point that stars are orbiting.

Really, Really Fast Stars

It wasn’t as easy as it sounds, but they did it. What is now known as the supermassive black hole called Sagittarius A is at the center of our galaxy. A close group of stars orbit this invisible point at incredible speeds. Astronomers estimate the size of the black hole is big enough to encompass our Sun and extend almost to the orbit of Mercury.

One of the orbiting stars known as S2 comes only as close to Sagittarius A as four times the distance of Neptune is from our Sun. Despite that distance, S2 reaches speeds of 5000 km/s (11 million mph) as it swoops by Sagittarius A and heads back out in a highly elliptical orbit. S2’s orbit takes less than 16 years to make one complete orbit. S2 will make it’s next closest approach in a few months….well, it actually will have happened 26,000 years ago.

2018 Blue Moon Lunar Eclipse

31 Wednesday Jan 2018

Posted by Paul Kiser in About Reno, Astronomy, Eclipse, Photography, Recreation, Science, Space

≈ Leave a comment

Tags

2018, astronomy, blood Moon, blue Moon, coyotes, eclipse, January 2018, lunar eclipse, Moon, Nevada, Reno, Super Moon, total lunar eclipse

The Almost Super, Blue, Blood Moon

The western United States experienced a total lunar eclipse this morning just before dawn. I set up at 4:30 AM on a vantage point at the northwestern edge of Reno, Nevada with my camera and my telescope. It wasn’t as awe-inspiring as the total solar eclipse in Oregon on 21 August of last year, but it was impressive.

Eclipsed Moon over Reno, Nevada

Unfortunately, Reno has been plagued with near constant high clouds this winter and this morning was more of the same. It allowed a good view of the eclipse of the Moon with the naked eye, but all my telephoto images lacked the clarity that I would have liked.

Coyotes Have the Last Howl

The best moment for me occurred after totality ended. As the Moon came out of Earth’s shadow, multiple packs of coyotes began to howl. It was amazing and a little unnerving. One coyote had to be within 150 meters, just below me. It is obvious that Reno is surrounded by packs of coyotes taking advantage of the food sources in human communities…including cats and dogs. Below is a recording of one of the two howling events.

I have seen several lunar eclipses in my life and it is fascinating to watch the white-washed Moon suddenly change to deep brownish red just before totality. The Moon becomes three dimensional and looks like a ball hanging in the sky.

Blocking the Sun’s reflected light allows us to see the stars near the Moon (click on image to see larger version)

During this eclipse, I noticed more stars in my images than in past eclipses. The high clouds hid almost all the stars from the naked eye, but the telephoto lens was able to capture them.

A last look at the partially eclipsed, Moon setting behind the hills

Not Quite Super

The media plugged this Moon for this eclipse as the ‘Super’ Moon. They can get away with that, but the Full Moon of 1 January was the 2018 Super Moon. It was closer to Earth when it reach the Full Moon phase at the beginning of the month. This Full Moon was also near apogee when it became a Full Moon, but not as close as the New Year’s Day Moon. It was close, but not quite; however, an “Almost Super Moon” doesn’t have the same zip as Super Blue Blood Moon.

It was entertaining to listen to reporters try and explain the terms when they had no clue what they were talking about. Makes me think that maybe I’m entertaining when people read my articles…but not for the reason I would hope.

If you like the coyotes howl, below is the second event that I recorded a few minutes after the first one. I didn’t have my camera focused on the Moon at first, so I added images over the sound at the beginning, but the end is the real time video of the post-totality Moon with the coyotes singing in the background.

Total Lunar Eclipse January 31…Western United States

20 Saturday Jan 2018

Posted by Paul Kiser in Astronomy, NASA, Photography, Science, solar, Space

≈ Leave a comment

Tags

blue Moon, Earth's shadow, eclipse, lunar eclipse, Moon

The last day of January will start with the second Full Moon of the month (a.k.a.: a Blue Moon.) It will then transform into a total lunar eclipse. Asia, the Pacific, and western North America will be able to watch the Earth’s shadow move across the Moon.

However, there’s a catch. It is an early morning eclipse in western North America and it will happen just before the Moon sets in the west. Locations with mountains to the west may see the Moon set before the total lunar eclipse ends.

In some places, the rising Sun will be brightening the eastern sky as the totality ends. The Sun will be rising on Earth as the Earth’s shadow moves off of the Moon. The Earth’s Shadow is almost four Moon diameters wide, but for most U.S. cities it will pass through the southwest quadrant of the shadow. Totality will last just over an hour.

Location of Moon in Earth’s shadow at Maximum Eclipse for Reno, NV

Eclipse When?

The times for the eclipse for several western U.S. cities:

City TOTALITY Begins Maximum Ends Moonset

Denver, CO (MST) 5:51 am 6:29 am 7:07 am 7:10 am

Salt Lake City, UT (MST) 5:51 am 6:29 am 7:07 am 7:41 am

Phoenix, AZ (MST) 5:51 am 6:29 am 7:07 am 7:27 am

Reno, NV (PST) 4:51 am 5:29 am 6:07 am 7:11 am

Los Angeles, CA (PST) 4:51 am 5:29 am 6:07 am 6:54 am

San Francisco, CA (PST) 4:52 am 5:30 am 6:08 am 7:20 am

Portland, OR (PST) 4:51 am 5:29 am 6:07 am 7:37 am

Seattle, WA (PST) 4:51 am 5:29 am 6:07 am 7:41 am