Ellen Coy

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APOD: Ring of Fire over Monument Valley (2013 May 09) Image Credit & Copyright: Tunç Tezel (TWAN) http://apod.nasa.gov/apod/ap130509.html Explanation: As the New Moon continues this season's celestial shadow play, an annular solar eclipse track begins in western Australia at 22:30 UT on May 9 -- near sunrise on May 10 local time. Because the eclipse occurs within a few days of lunar apogee, the Moon's silhouette does not quite cover the Sun during mid-eclipse, momentarily creating a spectacular ring of fire. While a larger region witnesses a partial eclipse, the annular mid-eclipse phase is visible along a shadow track only about 200 kilometers wide but 13,000 kilometers long, extending across the central Pacific. For given locations along it, the ring of fire lasts from 4 to 6 minutes. Near the horizon, the appearance of the May 9/10 annular eclipse (online viewing) is suggested by this dramatic composite from May of 2012. The timelapse sequence depicts an annular eclipse in progress before sunset over Monument Valley in the southwestern United States. http://twanight.org/Tezel Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130509 Starship Asterisk* • On This Day in APOD http://asterisk.apod.com/view_retro.php?date=0509

Why no eclipse every full and new moon?

In 2018, there are 13 full moons and 12 new moons, but only 5 eclipses – 2 lunar and 3 solar.<p>A lunar eclipse happens when the Earth, sun and moon …

Ancient DNA Found Hidden Below Sea Floor

In the middle of the South Atlantic, there's a patch of sea almost devoid of life. There are no birds, few fish, not even much plankton. But …

Watch the Solar Eclipse Live

Northern Hemisphere observers can watch the event via live feed.<p><b>Sky-watchers took to Twitter today to share their experiences watching the solar eclipse, which was visible from Australia and parts of the Pacific.</b><p>Tweeted @xoxoalbertxoxo: "Instead of studying for my AP tomorrow, I'm just gonna watch …

Watch The Ring Of Fire Eclipse Starting At 5:30 P.M. EST

For those outside the southern hemisphere, a livestream will show it in its fiery glory (without the risk of eye damage).<p>Stargazers in parts of Australia will get to witness a dramatic "ring of fire" solar eclipse later today. For anyone else who isn't hanging out down under, SLOOH, a robotic …

Time-lapse map chronicles decades of global change as seen from space

Satellite imagery can serve as a time machine, revealing dramatic change in just a few seconds — but can you imagine documenting almost three decades' worth of all that change, across most of our planet's land mass? A team of imaging experts, computer scientists and journalists did. Now they've …

In early May, unrest at several volcanoes

Several volcanoes erupted during the first week of May, 2013, including Mount Cleveland, the Mayon Volcano and Popocatépetl.<p>Eruptions occurred at …

Fungus network lets plants alert each other to defend themselves against aphid attacks

Underground fungus and plants have long been known to have a mutually beneficial relationship — mycorrhizal fungi delivers nutrients to plants, and the plants give carbon back in exchange. Now, a new study published in <i>Ecology Letters</i> shows in addition to that tradeoff, the mycorrhizal fungus …

'Dangerous Territory': Carbon Dioxide Levels Reach Milestone

Earth's atmosphere is entering a new era. A mountaintop research station that has been tracking carbon dioxide for more than 50 years says the level of that gas in our air has reached a milestone: 400 parts per million.<p>That number is one of the clearest measures of how human beings are changing the …

Atop A Hawaiian Mountain, A Constant Sniff For Carbon Dioxide

Climate scientists have a good reason to want to get away from it all. To get an accurate picture of the amount of carbon dioxide in the Earth's atmosphere, you have to find places where the numbers won't be distorted by cities or factories or even lots of vegetation that can have a major local …

Hubble Finds Atmosphere of White Dwarfs Polluted With Planet Debris

Astronomers using NASA's Hubble Space Telescope have announced the discovery of the atmospheres of two white dwarfs (burned-out stars) polluted with …

The Week In Numbers: The Brightest Explosion Ever, A Ticket To The Moon, And More

<b>3.6 billion light-years</b>: the distance from Earth of a recently observed gamma-ray burst, the brightest explosion NASA scientists have ever seen<p><b>$25,000</b>: the fine internet providers face per day if they refuse to spy for the FBI<p><b>200 horsepower</b>: the oomph in the turbodiesel engine of this …

Atmospheric carbon dioxide levels reach milestone high as global warming worsens

Atmospheric levels of carbon dioxide (CO2), one of the primary gases involved in global warming, reached a new, cautionary milestone yesterday. The oldest continuous CO2 measuring station in the world, an observatory on the Mauna Loa volcano in Hawaii, reported that levels of the greenhouse gas …

NASA Mars Curiosity Rover Report -- May 9, 2013

Thermal invisibility cloak in first demonstration

<b>Researchers have built and tested a form of invisibility cloak that can hide objects from heat.</b><p>Similar cloaking efforts are underway to make objects invisible to light and even sound waves, but this is the first device to work with heat.<p>The prototype, to be outlined in Physical Review Letters, …

APOD: Cape York Annular Eclipse (2013 May 11) Image Credit & Copyright: Courtesy Cameron McCarty MWV Observatory, Coca-Cola Space Science Center, Columbus State University Eclipse Team http://apod.nasa.gov/apod/ap130511.html Explanation: This week the shadow of the New Moon fell on planet Earth, crossing Queensland's Cape York in northern Australia ... for the second time in six months. On the morning of May 10, the Moon's apparent size was too small to completely cover the Sun though, revealing a "ring of fire" along the central path of the annular solar eclipse. Near mid-eclipse from Coen, Australia, a webcast team captured this telescopic snapshot of the annular phase. Taken with a hydrogen-alpha filter, the dramatic image finds the Moon's silhouette just within the solar disk, and the limb of the active Sun spiked with solar prominences. Still, after hosting back-to-back solar eclipses, northern Australia will miss the next and final solar eclipse of 2013. This November, a rare hybrid eclipse will track across the North Atlantic and equatorial Africa. Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130511 Starship Asterisk* • On This Day in APOD http://asterisk.apod.com/view_retro.php?date=0511

Engineer argues Egyptian pyramid decay is due to centuries of expansion

For centuries, Egypt's pyramids have been a point worldwide fascination. Scholars have long asked, how did the egyptians build them at all, much less so beautifully? But, when structural engineer Peter James looked at the pyramids, he asked why they were falling apart. The longstanding explanation …