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This week in pictures: September 8–14, 2012

In the past seven days, Curiosity tested the instruments on its arm, scientists argued that the discovery of a cloud of hydrogen and helium plunging toward the galactic center represents the remains of a planet-forming disk, researchers suggested that planets potentially hostile to human life might be the perfect place for extremophiles to survive, and more.

NASA/JPL-Caltech/Malin Space Science Systems

Mars Rover Curiosity's arm wields camera well

The activities confirmed good health and usefulness of the Mars Hand Lens Imager and used that camera to check arm placement during several positioning activities. Learn more »
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