Less of Our Light for More Star Light

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I have participated in the GLOBE at Night program sponsored by the National Optical Astronomy Observatory (NOAO) for several years and continue to support it for two vitally important reasons:

As an amateur astronomer, light polluted skies wash out both the quality of what can be observed and can radically reduce the number of stars and other celestial objects that can be seen.  Light pollution affects all visual telescopes, no matter how large they are.  That is why the world’s greatest observatories are almost always built on very high peaks in very remote places far away from cities.

 

Light Pollution from the Large Binocular Telescope Observatory, Mt. Graham Int'l Obs., Arizona. Photo courtesy of Marco Pedani & University of Arizona

Every photon created by artificial light requires a human-manufactured source.  Measured in what is called “kiloWatt hours” (kWh) the electricity that is used to create unnecessary light (overlighting) is a nonrecoverable expense.  We waste billions of kiloWatt hours every year, costing us billions of dollars in the production and service used to create the light that wasn’t needed to begin with.  As we think about our energy production and the price paid to create the fuels to generate it (coal, oil, gas, hydro, nuclear–even solar, wind, wave, geothermal, and other cutting-edge energy-producing technologies require huge costs to meet our power demands), just the amount lost to light pollution cannot be justified from either a perspective of economic sustainability or the stewardship of the earth’s finite resources.

 

Large Binocular Telescope. Currently the world's largest optical telescope for total combined aperture, 16.8 meters, 662 inches (55.16 feet). Mt Graham Int'l Obs., Arizona. Photo courtesy of John Hill and LBTO, University of Arizona.

I invite you to join in the effort to change this one vital part of preserving our natural resources, not just those from the Earth but also those of the sky.  Please watch the short video, and then read the letter from Dr. Constance Walker, PhD*, Director of the GLOBE at Night campaign, and then follow the links to join in the fun of walking out your front door, looking up (I’ll bet you haven’t intentionally looked at the sky in a long time!), and with the very user-friendly GLOBE at Night instructions, instantly become an important participant in a global research project with such important implications.

Please note that the results for people living in the Northern Hemisphere must be submitted by April 4, 2011!

Note: Any connection between exposure to artificial light at night and cancer remains under investigation. The statement in the video represents that of the producers and not necessarily the views of Extreme Thinkover or GLOBE at Night.  See links below for more information**.

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Join the 6th worldwide GLOBE at Night 2011 campaign:

March 22 – April 6

With half of the world’s population now living in cities, many urban dwellers have never experienced the wonderment of pristinely dark skies and maybe never will. This loss, caused by light pollution, is a concern on many fronts: safety, energy conservation, cost, health and effects on wildlife, as well as our ability to view the stars. Even though light pollution is a serious and growing global concern, it can be one of the easiest environmental problems you can address through responsible lighting on local levels.

Participation in the international star-hunting campaign, GLOBE at Night, helps to start the process of addressing the light pollution issue locally as well as globally. The campaign invites everyone all over the world to record the brightness of the night sky. The campaign runs from March 22 through April 4 in the Northern Hemisphere and March 24 through April 6 in the Southern Hemisphere. The campaign is easy and fun to do. First, you match the appearance of the constellation Leo or Crux with simple star maps of progressively fainter stars found.  Then you submit your measurements, including the date, time, and location of your comparison. After all the campaign’s observations are submitted, the project’s organizers release a map of light-pollution levels worldwide. Over the last six annual 2-week campaigns, volunteers from more than 100 nations contributed over 60,000 measurements, 30% of which came from last year’s campaign.

To learn the five easy steps to participate in the GLOBE at Night program, see the GLOBE at Night website. You can listen to this year’s 10-minute audio podcast on light pollution and GLOBE at Night. Or download a 45-minute powerpoint and accompanying audio. GLOBE at Night is also on Facebook and Twitter. (See the links at the end.)

The big news is that children and adults can submit their measurements in real time if they have a smart phone or tablet. To do this, you can use the web application. With smart phones and tablets, the location, date and time are put in automatically. And if you do not have a smart phone or tablet, there are user-friendly tools on the GLOBE at Night report page to find latitude and longitude.

For activities that have children explore what light pollution is, what its effects are on wildlife and how to prepare for participating in the GLOBE at Night campaign, see the Dark Skies Rangers activities. Monitoring our environment will allow us as citizen-scientists to identify and preserve the dark sky oases in cities and locate areas where light pollution is increasing. All it takes is a few minutes during the 2011 campaign to measure sky brightness and contribute those observations on-line. Help us exceed the 17,800 observations contributed last year. Your measurements will make a world of difference.

Primary Mirror, Gran Telescopio CANARIAS, world's largest single aperture, 10.4 meters, 664 inches (55.3 feet). Photo courtesy GTC & ORM, Canary Islands

Primary Mirror, Gran Telescopio CANARIAS, currently the world's largest single aperture optical telescope, 10.4 meters, 664 inches (55.3 feet). Photo courtesy GTC & ORM, Canary Islands

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GLOBE at Night: http://www.globeatnight.org/

Star Maps: http://www.globeatnight.org/observe_magnitude.html

Submitting Measurements: http://www.globeatnight.org/report.html

Web App for Reporting: http://www.globeatnight.org/webapp/

Audio Podcast: http://365daysofastronomy.org/2011/03/07/march-7th-globe-at-night-2011/

Powerpoint: http://www.globeatnight.org/files/NSN_GaN_2011_slides.ppt

Accompanying Audio: http://www.globeatnight.org/files/NSN_GaN_2011_audio.mp3

Facebook: http://www.facebook.com/GLOBEatNight

Twitter: http://twitter.com/GLOBEatNight

Dark Skies Activities: http://www.darkskiesawareness.org/DarkSkiesRangers/

The Milky Way as you've probably never seen it under excellent dark skies. View inludes Sagittarius, Libra, Scorpius, Scutum & Ophiuchus from Cerro Tololo, Chile. Photo courtesy of W. Keel, Univ. of Alabama at Tuscaloosa.

*Constance Walker, PhD, director, GLOBE at Night campaign (www.globeatnight.org)
chair, International Dark-Sky Association Education Committee
chair, IYA2009 Dark Skies Awareness Cornerstone Project
member, Astronomical Society of the Pacific Board of Directors
associate scientist & senior science education specialist, NOAO
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Star of Wonder–Transformed from Myth to Astronomical Event?

Star of Wonder-- Myth or Astronomical Event?

Part 1

This is a story that starts in the wrong place.  They’re my favorite kind.  And the wrong time.  That’s even better.  A story that starts in the wrong place and the wrong time has to be interesting.  There’s something to be said for predictability, but it rarely makes for a good plot or an intriguing ending.

This story does not have those disadvantages.  Some people have believed it was true.  Others believed it was false.  Others, still, believed it was myth, of uncertain veracity, but a beautiful, even elegant narrative.  For two millennia, Christians have believed it was part of a miracle.  Others, of different faiths, may have acknowledged it as a lovely story, but of no spiritual significance.  For the past four hundred years, as men and women have studied nature in new and innovative ways, and expanded our understanding of the Earth and the sky into a cosmos unimaginably large and old, the story’s credibility declined, seemingly moving toward the status of a fairy tale.

All of this, while true, is not the start I to which I was alluding.

Flores sapiens next to Homo sapiens. Photo Credit: National Geographic & Nature/ Peter Brown

Sometime around six thousand years ago, the human race, Homo sapiens sapiens discovered a problem.  The Neanderthals (Homo neanderthalensis) and the Cro Magnon (Arcahic Homo sapiens) were long extinct; one hominid now possessed all that was known to exist (the earliest dating for Homo florsiensis is currently 18K years). It might have been earlier, but the record left by humans before that gets harder and harder to read.  So, I’ll suggest six thousand years, with the caveat that date might need to be adjusted with the next archaeological blockbuster discovery.  The problem was the Earth.  More specifically, the ground.

I need to, at this point, dispel one very important, misconception.   That is the

Turkana Boy: Homo erectus, 1.5 mil. yrs. Field Museum, Chicago. Replica. Your ancestor? Yes. Your intellectual equal? Nope.

fallacy of modernity.  The individuals I to whom I am referring are modern humans.  Same body, same brain, same capacity for intelligence, problem solving, or IQ.   Just like Albert Einstein, your neighbor Justin, who wears only faded NASCAR t-shirts, your eccentric Aunt Lizzy, that beauty Angelica or hunk Chad (depending on your hormonal drivings) who in high school you never had the nerve to ask out, or even your cousin Zeke.  All right, maybe not cousin Zeke, but that is only because he hasn’t put down the game controller or said a single word since Call of Duty: Modern Warfare 113 came out.  He may be more cyborg than human after all this time.

This is the paradigm I want you to remember: ancient ≠ primitive.  Got that?

Back to our discovery.  At some point in the ancient past, one of our ancestors had the revolutionary thought that the ground was substantively different from the sky.  This was not a “well, duh,” moment.  It was a paradigm shift, perhaps capable only due to the superior huge frontal cerebral cortex of the Homo sapiens.  The shift was beyond the observation of a day/night cycle, although that would have been part of it.  This shift, like the differentiation between the sense of the boundary between my body and not-my-body, changed the human perception between earth and sky.

Stuff comes out of the sky.  Rain, snow, hail, clouds, wind, fog, as well as birds and bugs.  Some of those things are good, even edible.  Bad things like volcanic or range fire smoke and ash, dangerous wind blowing debris and biting things can come out of the sky, too.

Geese flying over the surf. Oregon Coast, Sept '07

Some things, most things actually, in the sky are beyond reach.  The Sun, the Moon, the stars, and the wandering stars.  Some stars appeared to streak across the sky; others appeared mysteriously out of nowhere glowing with a dim head and a long tail.  And rarely, a flash of a new star in the night that soon disappeared.  Or every once in a while there was a day in which the Sun seemed to be consumed by a black disk, turning the day to dusk and all the birds stopped singing, or the Moon, its regular phases interrupted, too, a dark shadow crossing its face, then glowing a blood red before being released from its captivity.

Lunar Elipse, Feb. 27, 2007. Photo credit: Astronomy.com

The regular cycles of those things in sky that are out of reach is what we are interested in.  We live on the ground.  We can’t fly like the bugs or the birds.  We can’t live under water, either, but that is not the focus of this discovery.  Living on the ground, as we do, we know a lot about the ground.  Most of what lives on the ground keeps us alive.  Some of the other things that live on the ground can also kill us, but that is secondary to our discussion, as well.

Milky Way over Mauna Kea. Photo credit: Mauna Kea Observatory

On that day that one very bright modern human looked at the ground, maybe sifting a handful of dirt through his or her fingers, and then looking up at the sky, squinting at the sun or  gazing at the bright swath of starlight of the Milky Way, and said the equivalent of  “Huh, now that’s interesting,” and human understanding shifted forever.

From that moment, the science of astronomy was born, as well as those of geology and biology.  The problem was, earth and life were tangible.  The sky, however, was a complete mystery.

What was the sky?

Yes, that was the question: What was the sky?  What were the lights in the sky?   The daytime sky and the nighttime sky were so different.  Why was that?  Why did all the lights in the sky appear in the East, move in an arc reaching a highest point that changed with the season and then always set in the West?  But what about the stars in the Northern sky that never rose nor set?  For some of our observers, however, not knowing they lived below that line we now call the equator, the lights in the sky looked quite different, still rising and setting East to West, but those stars that never rose nor set were to the south.

The Sun, the greater light to rule the day, its brightness so intense to dare a glance

Total Solar Eclipse with Diamond Ring Effect

of more than a fleeting moment brought pain, even blindness.  At the same time, it brought the warmth of the day, its risings and settings regular, though half of the time, the days would grow longer and half of the time shorter, and with it the corresponding warmth and seasons.  The earth tuned itself to this great annular cycle, of living and dying, growing and seeding, warming and cooling.

The Moon, the lesser light to rule the night, possessed a soft glow that one could study without risk; its phases regular following the seasons decreed by its daytime master, its face never changing. Yet at intervals beyond comprehension, it, like the Sun, would be covered with a shadow, at times in part, at others completely.

Of the night, though, what of the Wandering Stars?  The first a fleeting spark always near the Sun’s rise or setting. Next, brighter than the others, one of the mornings and one of the evenings at times so bright it cast a light that caused shadows. Another with a glow of angry red, appearing out of nowhere and growing into a dominant light.  A fourth, a great golden giant stately moving through the heavens night after night.  Also a fifth, whose trek seemed like that of an old one slowly working its way through the constellations.  And some, it is said, saw a sixth, dim grey-blue phantom only on the rarest of nights.  Against the apparent immutable backdrop of the other lights at night, why did these few shine without the twinkle of all others, and how, against all reason, did they change their direction in the sky and track back toward the East, then inexplicably again reverse and march toward the West?

Five planets - Mercury, Venus, Mars, Jupiter and Saturn - gather over the ancient Stonehenge monument in England. *Image Copyright*: Philip Perkins

What was the sky?  Why did some of the lights form patterns against the black velvet backdrop of night?  What was the swath of light that cut across the sky from horizon to horizon?  What was the force or cause of their motion?  What were the faintest clouds of light, while others seemed to cluster into groups distinct from the random spread of most of the stars?

One might say the ancients had plenty of time to work this all out.  Day after day and night after night, if they chose to pay attention, they could discover patterns and cycles.   On every continent where humans collected, they in fact did pay attention, and observed the patterns and cycles.  What they decided those observations meant and what caused them was another thing altogether.

To explain the sky, both day and night, these individuals drew upon the source of information they understood the best: the ground and the sea, and the abundant life that inhabited both.  Those were the things they would touch.  They made the very logical assumption that the sky was made from the same things the earth and oceans were.  They couldn’t have been more wrong.  At the same time they couldn’t have been more right.

I must again remind you of our one rule: ancient ≠ primitive.  The observers devised theories about how the earth, sea, and sky came into being, using the “materials” to which they had access.  We call these descriptions of the creation of the world, myths.  That is, if we are honest, modernocentric, even arrogant.  It can result in our overlooking key facts and observations, assigning to them to the status of fable rather than seeing myths for what they were: descriptions of the origin and  forces of nature and life.

The Aztecs provide a perfect example of a creation account that follows their observations of the natural world:

Quetzalcoatl: Aztec Lord of the Morning Star & Wind

The dualistic gods Quetzalcoatl and Tezcatlipoca, lightness and darkness, looked down from their dwelling in the sky at the water below. Floating on top of the water was an enormous Earth Monster goddess who devoured all things with her many mouths, for the goddess had gaping mouths at the knees, elbows and other joints.

Everything the twins created, the enormous, floating, terrible, insatiable goddess ate. The twin gods, normally implacable enemies, agreed she had to be stopped. They transformed themselves into two enormous, slithering snakes, and slid silently into the dark, cool water, their cold eyes and flicking tongues seeking her body.

One of the snakes wrapped itself around the goddess’s arms and the other snake coiled itself around her legs and together they tore the immense Earth Monster goddess in two. Her head and shoulders became the earth and her belly and legs became the sky. Some say

Tezcatlipoca: Aztec Lord of Death, Creator of Fire, Night Sky, & Warriors

Tezcatlipoca fought the Earth Monster goddess in his human form and the goddess ate one of his feet, therefore his one-legged appearance. Angered by what the dual gods had done, and to compensate for her dismemberment, the other gods decided to allow her to provide the people with the provisions they needed to survive.

From her hair were created the trees, the grass and flowers; from her eyes, caves, springs and wells; rivers flowed from her mouth; and hills and mountains grew from her nose and shoulders.

The goddess, however, was unhappy, and after the sun sank into the earth the people would often hear her crying. Her thirst for human blood made her weep, and the people knew the earth would not bear fruit until she drank. This is the reason she is given the gift of human hearts. In exchange for providing food for human lives, the goddess demanded human lives.  Source: James W. Salterio Torres

Though the price of human sacrifice causes us to shudder, the battle with the Earth Monster goddess, with her defeat and dismemberment is hauntingly similar to the Sumerian story of the defeat of Tiamat:

Tiamat possessed the Tablets of Destiny and in the primordial battle she gave them to Kingu, the god she had chosen as her lover and the leader of her host. The deities gathered in terror, but Anu, (replaced later, first by Enlil and, in the late version that has survived after the First Dynasty of Babylon, by Marduk, the son of Ea), first extracting a promise that he would be revered as “king of the gods”, overcame her, armed with the arrows of the winds, a net, a club, and an invincible spear.

And the lord stood upon Tiamat’s hinder parts,

And with his merciless club he smashed her skull.

He cut through the channels of her blood,

And he made the North wind bear it away into secret places.

Markuk slaying Tiamat. Bas relief on stone.

Slicing Tiamat in half, he made from her ribs the vault of heaven and earth. Her weeping eyes became the source of the Tigris and the Euphrates. With the approval of the elder deities, he took from Kingu the Tablets of Destiny, installing himself as the head of the Babylonian pantheon. Kingu was captured and later was slain: his red blood mixed with the red clay of the Earth would make the body of humankind, created to act as the servant of the younger Igigi deities.

Source: Wikipedia–Tiamat

Two creation stories, having so many parallels, even though those who devised them lived on opposite sides of a planet they did not know as such, and who never had had contact with one another.

The ground, the sea, the sky were all the world.  Thousands of years would pass before the problem of the sky would again be addressed.  The untouchableness of the sky would create a new question, without which, this story could not continue in Part 2.

Now for Something Beautiful…Sunset Over Kecks’ Twin Domes

This from Astronomy.com:

The Keck interferometer on Mauna Kea, Hawaii. The interferometer consists of two telescopes each with a 10 meter reflecting mirror, made up of 36 hexagonal mirrors on computer controlled actuators for pinpoint accuracy (4 nano-meters), in separate domes, about 279 feet (85 meters) apart.  Photo Credit: W. M. Keck Observatory.

Twin Keck 30 Meter Observatories at Sunset, Mauna Kea, Hawaii

Note the observing shutters have been opened and are facing east, so when the first objects to be observed come up over the horizon, the telescopes will be able to track them immediately. Interferometry has two great observing advantages. First, using two telescopes twice the amount of light coming from the object is captured. Second, just like having two eyes, each image is that tiny bit from a different perspective, giving the telescopes a kind of stereo vision and that allows for the computer processing the image to add in a great more detail.  The observatory to the left of the two Kecks is the Subaru 8.2 meter optical/infrared telescope operated by Japan.

Cutaway View of Twin Keck Domes and Astronomy Center

From the Astronomy.com article:

An exquisite look at black holes

The Keck Interferometer directly resolves the accreting material around supermassive black holes in galactic nuclei. Provided by Max Planck Institute, Bonn, Germany. December 8, 2009

“An international research team presents some of the first long-baseline interferometric measurements in the infrared towards nearby active galactic nuclei with the Keck Interferometric Telescope in Hawaii. The team, led by Makoto Kishimoto from the Max Planck Institute for Radio Astronomy in Bonn, Germany, found the measurements to indicate a ring-like emission from sublimating dust grains and its radius to yield insights into the morphology of the accreting material around the black hole in these nuclei.”

Cutaway Diagram of the Keck 10 Meter Telescope with Annotations

For more photos of the Kecks and their observing gallery, click here.

Photos Courtesy of the W.M. Keck Observatory.