Showing posts with label Moon. Show all posts
Showing posts with label Moon. Show all posts

Wednesday, June 17, 2020

Ancient Moon Shadows

Is everyone ready for the Annular Solar Eclipse this Sunday, June 21st?  Charted a viewing spot? Got your glasses? Tracked the path of totality and calculated obscuration?

Now imagine that if you didn't fully prepare and estimate those facts accurately, you could be beheaded. Not a typo. Beheaded. Because history is wild. 

On October 22, 2136 BC, astronomers in China noted what is now the oldest surviving record of a total solar eclipse, which occurs when the moon passes between the Earth and the sun, causing the moon's shadow to fall upon Earth and block the sun from view.

In ancient China, astronomy was a government-mandated pursuit, and state astronomers had quite sophisticated observatories for their time. Good thing too, for observing solar and lunar eclipses, as well as tracking planetary orbits, were divination tools for predicting the fate of the Emperor.

If an Emperor could predict a solar eclipse, such was a good omen for his health; accuracy was helpful in validating that he was the ordained link between heaven and his subjects on Earth, endorsing his divine right to rule. Imprecise predictions could be seen as evil omens, or even result in a new ruler, whereby rivals for power might use the eclipse as a sign that they could overthrow one who had lost the blessing of the gods. Careful records were made of all solar eclipses. (Lunar eclipses were only haphazardly noted, being so common as to merit lesser import.)

Solar Eclipse
As early as 2650 BC, a star-gazer named Li Shu wrote about celestial bodies, in particular noting that the sun, earth, and moon moved in harmonious ways. Technology in ensuing years revolved around trying to forecast when certain events might occur so as to keep their political successions and societies more stable.

The fascinating field of "Archaeoastronomy" shed light on the Oracle Bones of the Shang Dynasty (1600 – 1050 BC), unearthed in Anyang, Henan Province. Hailed as the bones of dragons (though actually turtles or oxen), they represent some of the earliest Chinese writings. One such gem tells us that the failure to correctly predict the timing of a total solar eclipse resulted in beheadings:
"Here lie the bodies of Ho and Hi,
Whose fate, though sad, is risible;
Being slain because they could not spy
Th' eclipse which was invisible."

Surely these weren't the only two state astronomers to lose their heads, given how erratic solar eclipses can be in any specific geographic location. With so much at stake, precision was well sought after. By 720 BC, some Chou Dynasty astronomers recognized eclipses as "naturally" occurring phenomena, and not heavenly commentary on who held any particular throne. Still, diligent record-keeping continued up through the ages.

Oracle Bone
By the turn of the millennium, the Chinese had a firm grasp of what actually caused eclipses, and by 206 AD, they were predicting cycles by analyzing lunar orbits. Their records show that between 600 and 1300 AD, their solar eclipse timing predictions were often accurate to within about 20 minutes!

To see how it's done in the modern day, see the NASA Eclipse Website.

Also be sure to join me on Twitter tomorrow for my #TriviaThursday series, with everything you need to know about #Eclipse dynamics and safe viewing this weekend!



Tuesday, November 12, 2019

Lunar Ponderings


A stunning anniversary just passed: 50 years since Apollo 11. We have 6 more Apollo lunar anniversaries to go, (7 overall in this program if one counts the non-lunar Apollo-Soyuz Test Project). For years, I've tracked statistics of Apollo missions and astronauts as they aged. And each time I have to update my records, the solemnity of the loss halts all activity in my brain.

On December 19, 1972, upon the splashdown return of Apollo 17, there were 12 men on planet Earth who knew what it was like to walk on the surface of our Moon. This fact remained true for true for 18 years and 7 months.


Then, in August 1991, James Irwin (Apollo 15) died of a heart attack at age 61.

In 1998, Alan Shepard (Apollo 14) died of leukemia at age 74.

In 1999, Pete Conrad (Apollo 12) was killed in a motorcycle crash at age 69.

In 2012, Neil Armstrong (Apollo 11) died of heart failure at age 82.

In 2016, Ed Mitchell (Apollo 14) died in his sleep at age 85.

In 2017, Gene Cernan (Apollo 10 and 17) died of long-term illness at age 82 and Dick Gordon (Apollo 12) died of cancer at age 88.

In 2018, John Young (Apollo 10 and 16) died of pneumonia at age 978, and Alan Bean (Apollo 12) died of sudden illness at age 86.

Today, as we approach more 50th anniversaries of lunar landings, there are just 4 men left who remember traveling to and working on the Moon.

  • Buzz Aldrin turns 90 years old in January 2020.
  • David Scott is 87. 
  • Jack Schmitt and Charles Duke are both 84.
Among the other Apollo (orbiting or CSM pilot) astronauts, all are now octogenerians, with youngest Ken Mattingly reaching the age of 84.

Even if the youngest of them make it in to their 90s or to 100, will they see another Moon mission? Will they watch astronauts who are American or Chinese? Male or female?  Will it be just as inspiring to the world?

L to R: Charlie Duke (Apollo 16), Buzz Aldrin (11), Walter Cunningham (7), Alfred Worden (15), Rusty Schweickart (9), [Harrison] Jack Schmitt (17), Michael Collins (11), and Fred Haise (13).
PHOTO CREDIT: Felix Kunze/The Explorers Club

Some think we could pull off a Moon mission by 2024, though with how administrations roll (I've seriously been watching various plans and cancellations across my entire lifespan now), it will be more like 2027.
  • At that point, Buzz Aldrin will be 97. 
  • David Scott will be 94. 
  • Jack Schmitt and Charles Duke will be 91. 
  • Every living Apollo astronaut will be a nonagenarian. 
I wonder, will they make it? Statistically, the deaths in this tiny club are accelerating, and we can expect to lose a few more before we see a return to the lunar surface, given that even the best technological developments never seem to last past early stages. Anything could suffer cancellation again, in favor of Mars, Asteroids, or on the altar of war, economic depression, or unforseen disaster.

So, when we return to the Moon, if we return to the Moon, will anyone alive personally remember what it was like to visit the Moon?

Something to ponder.

Sunday, September 1, 2019

On The Moon in 1902

Thanks to the joy that is YouTube, I've been watching the very first science fiction film ever created in 1902. In fact, it was released TODAY, 117 years ago!  

Le Voyage dans la Lune or A Trip to the Moon was a produced and directed by Georges Méliès, and loosely based on stories in Jules Verne and H.G. Wells novels ("Earth to the Moon" and "First Men in the Moon" respectively). 

 The budget? 10,000 Francs or about $1800, which wasn't chump-change at the turn of the 20th century! (That would now be in the range of $50,000 dollars.) The silent film, originally narrated in French with a running time of 14 minutes, was extremely popular upon release, and is now public domain because its copyright expired after 100 years. 

Le Voyage dans la Lune The leader of an astronomical society proposes a trip to the moon, whereby most astronomers say the trip cannot be accomplished, but six agree to try. A hilarious scene building a "spacecraft" ensues, inexplicably showing men banging hammers onto what looks like a giant metal bullet! A pack of dancing girls push the bullet into a cannon, then "break the fourth wall" by waving to the audience! Makes me wonder if NASA ever considered hiring cheerleaders. 

The moon is characterized as a large face, and the space craft crashes into his eye – but then the view switches to a flat terrain. The astronomers fling open the hatch, disembark in their street clothes... and I guess "realism" in sci-fi mattered as much then as it does now – since they had no pesky problems with the atmosphere being breathable nitrogen and oxygen... too funny! 

 The astronomers watch Earth rise over the horizon, another understandable error of the time -- since to a person viewing Earth from the tidally-locked lunar surface, one side of the Moon always faces toward Earth and any such "rise" would only move slowly in a horizontal direction, taking many days to complete.  

You can tell I'm a barrel of laughs in movie theatres.

 

After the astronomers set up camp to sleep, a comet passes, and they are watched by human-faced stars in the shape of the Big Dipper. Saturn makes an interesting surprise appearance, but don't get me started on the snow flakes, the gigantic mushroom or the jumpy little Selenite acrobats exploding into smithereens. (???) 

Eventually, they are taken to a palace, where they kill the Moon King (we really can't be trusted to play well with others) and rush back to their big bullet. After toppling off a moon cliff and landing in Earth's ocean (I thought the jellyfish were nice touches), they are towed ashore where they are greeted by a parade. Hmm... wonder what Neil & Buzz thought of this masterpiece? ;) 


Wednesday, May 15, 2019

Pillownaut Muse


After my follow-up DEXA Bone Scan last winter, and the nice article NASA's Human Research Program published about me and other past pillownauts in preparation for the new simulation protocols, I didn't expect much more to happen. It's been many years since my studies, and my blog is now only rarely updated.

I pondered perhaps "over-hauling" this site to be a #SciComm hub -- but honestly, I think there are so many great existing Science Communication sites, and I will work to amplify those. I figured I'd had my 15 minutes of fame, and decided to leave my old blog "as-is" as a historical record of how I lived through the unique experiences of Space Flight Simulations projects at NASA.

But. Every time I think I'll never hear about it again, another author or press outlet comes knocking. Last time it was Charles Wohlforth, and you should definitely still read his great book, "Beyond Earth: Our Path To a New Home in the Planet." My father was very impressed they devoted more space to me than to Neil Armstrong, so we may have to put that on my tombstone.

Along came Minute Number 16...

http://pillownaut.com/muse/muse.html


Muse Magazine asked to feature my studies and chose the same title, just spelled a bit differently! In "Beyawned Earth," writer Jen Mason compiled many of my past blog excerpts, a few older press turns, and many of my personal photographs from quarantine into an exceptional article designed to teach students about space flight and how it affects the "biological packages" that travel in spacecrafts.

Reading the finished product, I was definitely the happiest I've ever been with an interview. I've had TV and radio stations ask me exhaustingly inappropriate questions; sometimes even reputable outlets go for the sensationalist spin by giving the study clever little [incorrect] nicknames or dwelling on incidental details, like how we manage to shower during simulations, or that we cannot have sugar or caffeine or salt in quarantine. Sure, those things are challenging, but not life-threatening. They pale in the quest for good data.

http://pillownaut.com/muse/muse.html


However, MUSE Magazine hired a skilled and serious writer who truly nailed the science. After literally a decade of interviews in varied formats, and even being featured on the NASA website itself, this was really the first full-length article that revolved around MY OWN WORDS REGARDING MY OWN EXPERIENCES. This is the closest article to what I would have written myself. Maybe someday, some outlet will invite me to do so. Hope springs eternal.

I was gratified that this particular entity put the science in detailed and accurate terms, because it's directed at students and young adults potentially getting started in scholastic concentrations, and beginning to think about choosing majors.

Issue came out in March, and I was thrilled to receive copies by May, after I returned from my 6-week trek in Europe. You can order back issues of Muse Magazine yourself, or subscribe your teens, at Cricket Media.

My entire list of articles has been updated to include the last 2 years.

Friday, February 22, 2019

Technicolor Moon Rocks


Moon rocks like you've never seen them before! We generally tend to think of the moon in... oh, about 50,000 shades of grey, as it were.

However, samples returned to Earth are just full of secrets at many levels. BEHOLD! The microscopic colors of Luna Selene...

Apollo 12 basalt thin section

These amazing images are the work of Stuart Forbes, taken when he was a geology student at Edinburgh University, in preparation for an exhibition at a public observatory to commemorate the 30th anniversary of the first moon landing.

Thanks to a loan scheme with NASA and PPARC (Particle Physics and Astronomy Research Council), Stuart obtained access to a pack of lunar material, containing a lucite disk of six whole moon rocks and twelve "thin sections" -- slices of rock cut so thin (30 microns) that light is able to pass through them.

Apollo 15 Regolith thin sections

Because of the optical properties of minerals, two polaroid filters, one above and one below, produce an interference pattern that results in the lovely colors; interpreting them is one of the core skills learned by geology students.

Apollo 16 astronaut John Young was scheduled for a lecture, whereby Stuart asked the hosting museum if they would like the exhibition re-created. THIS time, when they got their hands on the moon rocks, he had special equipment prepared to photograph them!

Apollo 17 gabbro thin section

Stuart even had the pleasure of escorting Astronaut Young through the exhibition, and such was his exciting turn-of-the-century brush with planetary geology. These samples are available to borrow for schools, universities and museums in the USA & UK, so other educators should definitely feel encouraged to do wat Stuart did, if you are affiliated with spaces that hold science exhibits of any kind.

John Young's Thank-You Gift to the photographer!

Click on any of the pictures in this post to see the entire lunar gallery by Stuart Forbes, where you can see other examples of basalt, regolith, breccias, soilin, anorthositein and gabbro… and thank you, Stuart, for generously sharing these beautiful photographs with everyone!

Monday, December 22, 2014

Moon Musings

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A stunning anniversary just passed, and it's been on my mind all weekend.

On December 19, 1972, upon the splashdown return of Apollo 17, there were 12 men on planet Earth who knew what it was like to walk on the surface of our Moon. This fact remained true for true for 18 years and 7 months.


Then, in August 1991, James Irwin (Apollo 15) died of a heart attack at age 61.

In 1998, Alan Shepard (Apollo 14) died of leukemia at age 74.

In 1999, Pete Conrad (Apollo 12) was killed in a motorcycle crash at age 69.

In 2012, Neil Armstrong (Apollo 11) died of heart failure at age 82.

Today, there are 8 men left who remember traveling to and working on the moon.

  • Buzz Aldrin turns 85 years old in January.
  • Ed Mitchell and John Young are also both 84. 
  • Alan Bean and David Scott are both 82. 
  • Gene Cernan is 80.
  • Jack Schmitt and Charles Duke are both 79.
In less than one year, every single man who walked on the Moon will be an octogenarian.

Even if the youngest of them make it in to their 90s or to 100, will they see another Moon mission? Or perhaps, as has been hot news this year, BEYOND the moon? Will they watch astronauts who are American or Chinese? Male or female? Who will be President in that era? Will it be just as inspiring to the world?


Some think we could pull off a Moon mission or beyond by 2020, though with how administrations roll, it will be more like 2025.
  • At that point, Buzz Aldrin would be 95. 
  • Ed Mitchell and John Young would both be 94. 
  • Alan Bean and David Scott would both be 93. 
  • Gene Cernan would be 91. 
  • Jack Schmitt would be 90. 
  • Charles Duke would be 89. 
I wonder, will they make it? Statistically, we can expect to lose a few more of their tiny club before we see a return to the lunar surface, given that even the best ideas are still in the planning stages. Anything could suffer cancellation again, in favor of Mars, Asteroids, or on the altar of war, depression or unforseen disaster.

So, when we go back, if we go back, will anyone alive personally remember what it was like to go the Moon?

Something to ponder.

Saturday, September 7, 2013

Count Meteors for the LADEE Mission!

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LADEE, the Lunar Atmosphere and Dust Environment Explorer is a robotic lunar orbiter that will fly into the moon's atmosphere to sample its composition and structure and look for dust lofted into the lunar sky.  Determine the size, charge, and spatial distribution of electro-statically transported dust grains? She's on it!

LADEE Mission Patch

During LADEE's time over the surface-boundary exosphere (an atmosphere that is so thin and tenuous that molecules don't collide with each other), her UV Spectrometer will determine the global density, composition, and spatial variability of the fragile lunar atmosphere before it is perturbed by future human activity.

It may also shed light on the atmospheric species 20-150 kilometers above the lunar surface. Are these species at orbital altitudes there by virtue of solar wind? Released from lunar soil? Can we discover the cycles and sources of these species? LADEE may tell us!

LADEE Mission Phases

I think the most exciting portion of the mission will be the optical communications experiments. While in orbit, it will demonstrate the first 2-way high-rate long-range laser communications.  The Lunar Laser Communications Demonstration (LLCD) will test how spacecraft may be able to use lasers to send movies, high-resolution photographs and even 3D images to ground controllers, someday

LADEE launched yesterday evening from NASA Wallops Flight Facility in Virginia, though over 8,000 west-coasters also watched the launch event at an epic party at NASA Ames Research Center

And now now that LADEE is flying, NASA needs your help!

Meteor Counter for iPad and iPhone

During the LADEE Mission, NASA would like to have as many people as possible submitting meteor counts so scientists can compare that data to what LADEE's instruments record. And of course, there's an app for that.

Download the NASA Meteor Counter app, which allows observers to use their iPhones, iPads, or Androids to record meteor count observations, and send the data directly to NASA.

When you watch a meteor shower, just take your smart phone with you! (As if you leave it home anyway, right?)  Capture meteors with the "piano key" interface. As you tap the keys, Meteor Counter records critical data for each meteor: time, magnitude, latitude and longitude, along with optional verbal annotations.  These data are uploaded to researches at NASA for analysis.

Meteor Counter

Anothe great way to get involved is with your 8 to 14-inch aperture telescope to detect meteoroid impacts, as monitored by the NASA Meteoroid Environment Office, and the Lunar Impact Monitoring Program. In both entities, lunar scientists seek to determine the rate of meteoroid impacts on the Moon, as they are an important source for the lunar exosphere and dust.

The LADEE mission is a also a participant in the International Observe the Moon Night, and the Student Spacecraft Tracking and Monitoring effort, so visit LADEE Mission Opportunities page to pick a project!

Wednesday, September 4, 2013

Lunar Atmosphere Dust Environment Explorer

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Is everyone prepared for the historic launch of NASA's Lunar Atmosphere and Dust Environment Explorer this week? This will be the first of TEN launches in September! Busy rocket season.


This historic robotic mission to the moon will mark the very first lunar blast-off from a place that is not-Cape-Canaveral. It will also clear up many of the Moon Mysteries we humans have wondered about since the Apollo program.

NASA Wallops Flight Facility in Virginia is very excited to host the launch of LADEE (pronounced Laa-dee, as opposed to "lady") on a USAF Minotaur V. NASA Ames is holding an event at their parade grounds, and 8,000 people have purchased tickets! NASA TV will also carry pre-launch activities, so find a place to watch: 

NASA LADEE Lunar Launch
Friday, September 6th
NASA TV Coverage Begins 6:30pm PT / 9:30pm ET
LAUNCH WINDOW 11:27-11:31pm ET

Click to embiggen Launch Visibility map

Designed and built at NASA Ames, the Lunar Atmosphere and Dust Environment Explorer (LADEE) is a robotic mission that will orbit the moon to gather detailed information about the composition, density and variability of the thin (but glowing!) lunar atmosphere.

LADEE will  study conditions near the surface and environmental influences on lunar dust, and also test new laser communications technology that could potentially bring broadband speeds to planetary space missions!


The LADEE 3-phase animation, by Dana Berry at NASA Ames, first shows the Lunar Dust Experiment (LDEX) instrument, which operates by detecting ions generated when dust particles impact at high speeds. Data will be used to calculate the mass, density and electrical charge of lunar dust.  Phase 2 depicts orbital flight path variations, and phase 3 shows light from the sun scattering through the lunar atmosphere.

Why are such explorations important?

Interestingly, our Moon may be the most common type of atmosphere in the solar system -- perhaps in most solar systems. Known as a "surface boundary exosphere," a very similar type surrounds Mercury, the moons of our gas giants Jupiter and Saturn, all the largest asteroids observed, and even minor celestial bodies beyond the orbit of Neptune. 

Given that we have an SBE so close, we really ought to be exploring it!  In the future, the data may help probes land on Jovian moons!

Follow the NASA LADEE action on Twitter, and of course, I will be live-tweet all the action from the Pillownaut Twitter account, too.

Wednesday, August 28, 2013

Apollo Moon Tree

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Armed with my handy space maps, I am always on the lookout for Apollo Moon Trees, wherever I go.  Virginia was no exception, and I found the tallest one I've seen yet!

Apollo 14 Command Module pilot Stuart Roosa, who remained in lunar orbit while his cohorts Alan Shepard and Ed Mitchell frolicked about Fra Mauro, took hundreds of redwood, sycamore, pine, fir and sweetgum tree seeds aboard the Kitty Hawk capsule in 1971, at the request of Forest Service employees. Upon return to Earth, the seeds were distributed to various communities, resulting in the "Moon Trees".

Apollo Drive
Can you think of a better place to plant a Moon Tree?

Most Moon Trees were planted as experimental controls, alongside normal seeds, though many decades later there is no visible difference. The majority were distributed as seedlings, and planted in 1976 for bicentennial celebrations, though the List of Moon Trees records plantings from as early as 1973 and as late as 1984.

A few traveled to foreign nations, and still others found their way to universities, NASA centers, national parks and monuments -- including the White House.  To date, only one was ever deliberately removed – a New Orleans pine that was damaged during Hurricane Katrina.

My recent find was a beautiful sycamore at Booker Elementary School on Apollo Drive in Hampton, Virginia.

Hampton, VA Moon Tree

This particular tree is very special, and different from the others in that it was the result of a poetry contest held among the schoolchildren.

In 1976, then-6th grader Marjorie White (who is 52 now) wrote the winning poem called "A Tree Lives", which Booker has kept on their main office wall for many years, alongside a gold NASA plaque from when the tree was dedicated during the Bicentennial, and once again at the 30th anniversary in 2006.

The Winning Poem!
"A Tree Lives" by Marjorie White
(Click to see original in larger type!)

Despite knowing Roosa had hundreds of seeds, only 90 are listed officially by NASA – and a mere 44 have been photographed by the Waymarkers Moon Tree Group.  Sadly, they were not tracked efficiently. Like the Goodwill Moon Rocks, the 1970s handlers were casual about what would one day become a part of world heritage.

Pulling togehter many resources over the years, I have catalogued directions and coordinates to 83 Apollo Moon Trees, which can be found (along with outdoor scaled Solar Systems) on my Pillownaut Nature Walks Map.

If you know the location of any seeds, or where they were planted, curators at the National Space Science Data Center would love to hear from you. Email NASA if you find one!

Friday, August 9, 2013

Space Junk 2: Surface Litter

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Continuing on from yesterday's essay about the floating trash heaps we clever little monkeys keep unleashing into space, I though it was also worth mentioning the things we have sent to the orbit or surface of other celestial bodies.

Click for list of objects on Mars

Did you know the United States sent five probes to planet Venus in 1978? Then an orbiter in 1989. The Soviet Union sent 16 crafts to Venus between 1966 and 1985, including capsules, landers and even "balloon gondolas". You read that right. Balloon gondolas. No space-faring nation has sent anything since around the time the movie "Back To The Future" came out.

Still, even bringing up the rear of mysteries we have explored in our inner solar system, the scattering of major hardware on Venus amounts to 50,000 pounds or 25 tons. That's an awful lot of metal, slowly melting on the hot Venusian crust!

Surveyor 3 on the Moon
Click for a graphic of large objects mapped on the Moon

We hear far more about Mars in the news and popular culture, but only a fraction of similar metal exists on the red planet. And here, of course, some are still operational and moving about!

As of last summer, when the Curiosity MSL Rover landed successfully,  all the artificial objects on Mars, compliments of NASA, RFSA, and the ESA, come to 20,000 pounds or 10 tons.

It may sound like a substantial heap of hardware, but it's a relatively meager showing, considering that's only 13 crafts total out of 42 attempts! It's also a mere 5% of what we have landed or smashed into the moon.

It is not as easy to reach Mars and land as we might think. The majority of crafts sent up have either failed somewhere along the way, or suffered communication malfunctions, leaving their fate a mystery.

Space crafts on Venus, Moon and Mars
However, the list of lunar junk truly sets the record for off-world trash heaps. Our moon holds a whopping 393,000 pounds of space crafts, or just under 200 tons of human-made objects.

The USA, USSR, Japan, the European Union, India, and China now have 73 probes, [intentionally] crashed orbiters, landers and rovers on the lunar surface.

Wonder which of these will be heritage sites, national parks or Earth Monuments when we are finally a space-faring species? Or will we just send a clean-up crew? Either way, each of the lists linked above have convenient coordinates listed, so it's fun to go to Google Moon or Google Mars and map the human hardware!

Tuesday, July 9, 2013

Future Fate of Earth's Moon

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After my last round of #TriviaThursday about Moons, I got the following questions on Twitter and Facebook...


Our beautiful natural satellite orbits Earth ant-clockwise at 3,683 kilometres per hour (2,288 miles per hour).  It is not always the same distance from Earth, and  and to make a one giant oval-shaped trip, it travels 2,290,000 kilometres (1,423,000 miles).

This so-called "sidereal month" is the average period of revolution of the Moon around the Earth in reference to a fixed star, equal to 27 days, 7 hours, 43 minutes in units of mean solar time.

At it's closest, our Moon is about 363,300 kilometres (225,740 miles) away, and at it's farthest, 405,500 kilometres (251,970 miles).  The average distance is 384,467 kilometers (238,897 miles).


The oval, or elliptical, orbit is slowly becoming wider.  The Moon is actually moving away from earth at a rate of 3.8 centimeters (1.5 inches) per year, and slowing down. Because of this, Earth is also slowing down -- about 2 milliseconds per century. In other words, in 100  years, our day will be 2 milliseconds longer.

How is this happening? The Earth and Moon share angular momentum (of course, always conserved), and in this system, the Moon acquires the energy that Earth loses. This continually boosts our satellite to a higher orbit; neither can thus maintain their standard orbits in the eons to come.


Over a looooong period of time, rotations of the Earth and revolutions of the Moon will eventually match! Both will be about 40 days long.  If there is still a human population on Earth, they will constantly observe the moon overhead -- but the other side of the planet will never see it.  It's hard to say to what land masses it will hover over, because by this time, plate tectonics on Earth will ensure completely new configurations of continents.

Stability isn't the strong point of cosmic forces, so as the Moon pulls away, it will come under the Sun's angular momentum, losing energy and finally falling back toward Earth.  In about 3 billion years, Earth's Moon will break apart, perhaps 16,000 kilometres (10,000 miles) above the biosphere, creating a ring very much like Saturn's!  One imagines, meteorite hits to Earth will substantially increase.

At this point, the only tidal forces on Earth will be those caused by the Sun. There will be very different oceanic and sky-gazing worlds, indeed!  Won't they be amazing to see! Provided we haven't completely destroyed this planet and there are any eyeballs left to see it...

Friday, April 19, 2013

Name That Kepler Planet

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Such an exciting media briefing from NASA Ames!  Live from the Bay Area of California, Mission Manager Roger Hunter offered the Reader's Digest recap of how the Kepler Space Telescope determines orbital periods via transits, then Principal Investigator William Borucki wasted no time in tantalizing us with newly-found planets in the habitable zone of a red star!

They turned the stage over to Research Lead Lisa Kaltenegger, and BAER Institute scientist Thomas Barclay, who emphasized the amazing diversity of solar systems we are finding in our universe, a beautiful example being the newly detected Kepler-62 system.

Kepler Mission
Starlight on Kepler 62E and F

Two of the system's five planets, 62E and 62F, are the smallest exoplanets yet found, almost certainly rocky, with possible land masses and water. In fact 62E may be a "waterworld" of sorts, and 62F has polar caps. Surely with such alluring possibilities, we could come up with better names for these beauties?

 (Lively tangential conversations on Twitter during the media briefing were afire with naming possibilities instead of simply catalogue numbers. While I don't believe in "dumbing down" the science, that doesn't mean we can't make the discoveries more colloquially accessible.)

Nerds will be excited about possible "life signatures" on a faraway sphere, no matter what it's called. But will the general public embrace Kepler finds without nicknames? Of course, interest and coverage would explode a hundred-fold if we started naming them after Star Wars characters. Sad but true, so hopefully there can be a happy medium, when we see planets capable of sustaining life.

Kepler Telescope
Awesome Animated Infographic from the New York Times.
Click to embiggen and mouse over each Orrery for details!

Barclay said it best: "This is no longer an academic or theoretical exercise."

True. We have actually FOUND habitable planets. That alone is mind-blowing! Add to that the idea that either world may not just be habitable, but absolutely HABITED! With every new possibility, we see less and less reason to consider ourselves a rarity.

Kepler consistently examines over 150,000 stars in the Cygnus / Lyra field of the Milky Way –- merely one small area of one small galaxy. In a few short years, thousands of candidates and hundreds of confirmed habitable planets have been detected. Imagine then, the implications of the overall numbers in the greater multiverse!

Another amazing implication of these observations and bodies of research is that we could potentially surmise the future of our own Earth, once we understand the lifespans of stars, and their effect on planets within their habitable zones.

Kepler

Naturally, our excitement must be tempered with reasonable doubt. It's worth noting that if some faraway world is watching our solar system through a telescope, they would find both Earth and Mars in the "Galactic Habitable Zone" –- however, Mars gravity is unable to keep an atmosphere that would heat the planet surface. Just like us, they could only deduce possibilities, but at these distances, not know for sure.

However, each new project brings new data, each technological leap opens new possibilities, and as we add to our store of knowledge, our deductive powers of life signatures will only grow richer. The NASA TV session ended with press Q&A, and a novel opportunity to submit questions through social media, which I'm happy to see NASA centers embrace.

Many popular outlets such as New Scientist and Universe Today immediately covered the announcement with ample technical detail, and the original abstract for the Kepler-62 system can be found at the ScienceMag publication of the American Association for the Advancement of Science.  

Now, let's think of some names!


Wednesday, March 27, 2013

The Man Who OWNS The Moon

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You've probably heard of Dennis Hope, the man who claimed the Moon and has been selling acreage there since 1980. If you haven't, you're missing one of the greatest crackpot success stories of all time.  Con artist? Smartest dude, EVER? Hmm...
 
Moon Overload Dennis Hope
"Get off my lawn!"

Over three decades ago, Dennis Hope wrote to the United Nations, pointing out that the Outer Space Treaty does not specify that corporations or individuals cannot lay claim to lunar territory. Of course, the assertion is absurd, and if put to a point of law in court, his proclaimed "loophole" would easily be declared invalid among laughter in about 200 different languages.

The 1967 treaty forbids national governments from owning property in space as an early preventative measure against attempted militarization; space, like the Earth's oceans, is common property intended for the free use by all Earthlings. Still, since his initial letter (which garnered no response), the self-titled entrepreneur announced he has secured legal ownership of just about every other celestial body in our solar system, too.

Hey, if you're going to worship at the altar of crazy, you may as well be the high'n'mighty god of your newly created religion, right? 

Among the many buyers who have lined Hope's pockets? Three ex-presidents. Big-name Scientologist actors. All in all, millions of acres has resulted in Hope making millions of dollars.

Moon Map
Click to see what's already sold.

Incredibly, his lunar real estate development company -- which he refers to as the "Lunar Embassy" -- now consists of 3 full-time employees, 27 resellers, and 6 ambassadors!  They take Visa, MasterCard, AmEx, Discover and Diner's Club credit cards for all products.

When you purchase a lunar plot (a quite reasonably priced acre, in my opinion), you get a map of your particular location, a fancy parchment deed, and a copy of the Lunar Constitution, detailing the Moon's Bill of Rights and the "all important laws of THE HEAD CHEESE , the omnipotent ruler of the Moon" (seriously).

Our Moon Landlord calls the sales packages "novelty gifts" to avoid lawsuits, but zestily disputes other ownership claims from around the world, calling similar companies or individuals "criminals" and "pretenders".

Lunar Constitution
Yours for only $34.00, with 30-day Guarantee

 Happily, even if you've managed not to hear of Dennis Hope before, a filmmaker has created a documentary about him. The aptly titled "LUNARCY" will debut on EPIX next week on April 3rd.

I for one think this is awesome (hey, whatever kinda looneysicle he chooses to be, no one's ever made a documentary about ME, so who am I to talk, right?), and I plan to watch, because he also claims that his Galactic Government can solve Federal Deficit problem! Can't wait.

Tuesday, December 11, 2012

NASA Social with Astronaut Joe Acaba

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Another day, another Tweetup! Of course, they're called "Socials" now, but some verbal habits die hard.  I say "social". I think "tweetup". Regardless, astronauts are always worth the travel trouble.  During a rare winter heat wave in the nation's capital and surrounded by fellow SpaceTweeps, I enjoyed meeting Astronaut Joe Acaba at NASA Headquarters in Washington DC.

Heather with Joe Acaba

LIVE on NASA television, Acaba showed a slideshow of his two missions (one on Space Shuttle Discovery and one on Soyuz) to the ISS, describing many of his adventures with his crewmates in his cumulative 138 days in space.

Joe was part of NEAP, or NASA's Educator Astronaut Program, having been a middle school and high school science teacher... also, a geologist, Peace Corps volunteer, and... well, I'd give you his entire resume, but it would break the internet.

Joe Acaba Tweet

Suffice to say, Joe is incredibly accomplished both on Earth and in orbit!  He is also the very first Puerto Rican astronaut to travel into space.  Among his many humorous anecdotes that we tweeted madly through the Spacetweep crowd, he cracked that many fellow Puerto Ricans had attended to hear him speak, but lamented that none had brought him any Puerto Rican food!

He is a very funny speaker, though only spent about 20 minutes describing his work. He spent the remaining TV time answering questions from the studio audience in English, then questions from the @NASA_ES twitter account in Spanish.

NASA astronaut Joe Acaba

He also speaks a bit of Russian, having spent most of his last mission with two Russian crew-mates. Multi-talented, and multi-lingual!

You can watch the show on NASA TV's YouTube Channel: Astronaut Joe Acaba Sits Down with Followers in DC at NASA Social.

Heather with Apollo 11 Capsule

I also managed to squeeze in a quick visit to the Smithsonian Air & Space Museum to see the Apollo 11 Command Service Module "Columbia"!  Haven't seen this one since I was in grade school, but it never disappoints. Enjoyed many other wonderful artifacts there, including Sally Ride and John Glenn's suits, Moonwalk memories,

Click on any of the pictures above, or the link right here, to see the entire NASA HQ gallery over at Pillownaut Picasa!