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Scientists at NASA's JPL to plunge twin spacecrafts into lunar mountain (Video)

Ebb & Flow Grail spacecraft

NASA/JPL-Caltech/GSFC/ASU

This still image and animation shows the final flight path for NASA's twin Gravity Recovery and Interior Laboratory (GRAIL) mission spacecraft. Known as Ebb and Flow, they are scheduled to imapct impact the moon on Dec. 17, 2012, around 2:28 p.m. PST.

NASA's latest moon mission is about to meet its end in a dramatic fashion.

Twin spacecraft are poised Monday to hit a mountain near the moon's north pole after nearly a year in orbit. NASA planned this crash to avoid striking the Apollo landing sites or any other place on the moon with special importance.

RELATED: NASA to crash two spacecraft into a moon mountain

The spacecraft known as Ebb and Flow have been measuring the moon's gravity to better understand its interior and early history. To collect data, they've had to circle low above the lunar surface. They're running out of fuel so NASA will command them to hit the surface.

Since this will occur on the dark side of the moon, the space agency says skygazers on Earth won't be able to see it. Scientists from the Jet Propulsion Laboratory in Pasadena say the crash landing will occur about 2:28 P.M. PST.

Come back at 2:00 P.M. PST to see live commentary from NASA scientists as the Grail mission ends.


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