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A setting, waning crescent moon amid the thin line of Earth's atmosphere.

Best Space Photos Of The Week Oct. 8, 2011

Hubble Spots 500 Galaxies in Early Universe

7 Surprising Things About The Universe

NASA's NEOWISE asteroid survey indicates that there are at least 40 percent fewer near-Earth asteroids in total that are larger than 330 feet, or 100 meters.

Vote Now! Top Space Stories Of The Week Oct. 2, 2011

Wildfires and perhaps some intentionally set agricultural fires burn on the continent of Australia, with smoke plumes faintly visible in the night sky. A gold and green halo of atmospheric airglow hangs above the horizon in the distance.

Best Space Photos Of The Week Oct. 1, 2011

The Upper Atmosphere Research Satellite hangs in the grasp of the Remote Manipulator System during deployment from Space Shuttle Discovery, September 1991.

Vote Now! Top Space Stories Of The Week Sept. 25, 2011

Thierry Legault is part of a network of skywatchers armed with sophisticated astronomical gear to monitor the whereabouts of spacecraft.

Best Space Photos Of The Week Sept. 24, 2011

Image of the Jules Verne ATV re-entry by the DC-8 aircraft over the Pacific Ocean.

6 Biggest Spacecraft To Fall Uncontrolled From Space

This artist’s impression shows the planet orbiting the Sun-like star HD 85512 about 35 light-years from Earth.

Vote Now! Top Space Stories Of The Week Sept. 18, 2011

Northern Lights Ribbon Over Alberta

Best Space Photos Of The Week Sept. 17, 2011

This artist's concept shows NASA's Space Launch System atop its Florida launch pad.

The World's Tallest Rockets: How They Stack Up

Astronaut James B. Irwin, lunar module pilot, during the Apollo 15 lunar surface extravehicular activity (EVA) on August 1, 1971, at the Hadley-Apennine landing site. The first Lunar Roving Vehicle (LRV) on the moon, stands to the right.

Giant Leaps: Top Milestones Of Human Spaceflight

Japan's Venus Climate Orbiter "Akatsuki" will both the atmosphere and surface of Venus.

Vote Now! Top Space Stories Of The Week Sept. 11, 2011

Moon top mosaic

Best Space Photos Of The Week Sept. 10, 2011

The Top 10 Star Trek Technologies

Apollo 11 astronaut Buzz Aldrin stands on the lunar surface during the first moon landing in 1969

20 Most Marvelous Moon Missions

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