Earth's Moon: Formation, Composition and Orbit

Scientists say a giant impact knocked off the raw ingredients for the moon off the primitive molten Earth and into orbit.
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Domo Arigato, Mr. Pluto: Rock Band Styx Visits New Horizons Team
Styx Band Members and Showalter
July 2nd, 2015
The rock band Styx toured the control center for NASA's New Horizons mission to Pluto, and learned more about Pluto's smallest moon, also named Styx.
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'Leap Second' Tonight Will Cause 61-Second Minute
'Leap Second' to Be Added June 30
June 30th, 2015
Time will stand still for one second this evening (June 30) as a "leap second" is added to atomic clocks around the world. The extra second is needed to deal with Earth's irregular but gradually slowing rotation.
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Best Space Stories of the Week – June 7, 2015
Pluto's Moons: Size and Brightness
June 7th, 2015
Scientists announced surprising discoveries about Pluto's moons, a spacecraft beamed home amazing images taken from a comet's surface, and the United Arab Emirates outlined its bold Mars plans. Here's a look at's top stories of the week.
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How to See Venus, Saturn, Jupiter & Mercury in July's Night Sky
Saturn in July 2015
July 1st, 2015
July offers opportunities to see Venus, Saturn, Jupiter and Mercury overhead. Here's how, and when, to spot them.
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Sunrise at Copernicus: Spot Famous Moon Crater Tonight
June 2015 First Quarter Moon
June 25th, 2015
You can see the moon's famous Copernicus crater tonight (June 25) along the lunar terminator — the line that separates shadow from light.
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NASA Spacecraft Now Closer to Moon Than Ever
LRO Flying Closer to Moon Than Ever Before
May 22nd, 2015
On May 4, NASA's Lunar Reconnaissance Orbiter performed two engine burns, changing its orbit to one that gets within 12 miles (20 kilometers) of the moon's south pole and 103 miles (165 km) of the north pole.
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Europe's Next Space Chief Wants a Moon Colony on the Lunar Far Side
Moon Outpost Concept
May 1st, 2015
Johann-Dietrich Wörner expressed his enthusiasm for a moon colony at the Space Foundation's National Space Symposium, a gathering of global, commercial, civil, military and "new space" experts that was held here from April 13 to April 16.
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Venus and Jupiter Put on a Celestial Show This Month
Venus and Jupiter in July 1 Night Sky
July 1st, 2015
If you've been watching the western sky just after sunset lately, you will have noticed two bright objects, gradually drawing closer. These are the two brightest planets, Venus and Jupiter, and they're putting on a show this month.
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Best Space Stories of the Week – June 21, 2015
Ancient Mars
June 21st, 2015
Crashed comet lander Philae phones home. A dead satellite falls to Earth. Mars shows both methane-laced meteorites and a possibly icy past, and the moon's dust gets a source in the best of this week's space news.
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Highlights of May's Night Sky: The Big Dipper, Moon and Venus
Big Dipper Over the Canary Islands
May 15th, 2015
The famous Big Dipper star pattern shines in May's night sky, as do the moon and a surprisingly nocturnal Venus.
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