Source: http://gizmodo.com/5872388/twin-nasa-spacecraft-now-orbiting-the-moon
The probes will be ready for science on March 2012, when they will be spinning around the Moon every two hours in a near-circular orbit at just 34 miles from the Moon's surface.
The GRAIL mission—Gravity Recovery and Interior Laboratory—is designed to map the Moon's gravity map, allowing scientists to "see" into the interior of our satellite. The twin spacecraft constantly measure the distances between them and the surface of the Moon, which make them capable of detecting any changes on the gravity field.
The best part for kids all around America are the small cameras aboard both ships, called MoonKAM. Middle school students would be able to control these cameras during a special program led by America's first woman in the space, Sally Ride. Maybe one of the students will find aliens there, as scientists discover that our satellite is actually made of Gouda cheese. [NASA]
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