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Thursday, December 13, 2012

Grail Probes Set to Crash

NBC News also has an article about the Grail spacecraft, which are scheduled to crash into the Moon:
. . . The $496 million Grail mission — short for Gravity Recovery and Interior Laboratory — launched in September 2011, and Ebb and Flow arrived in lunar orbit about three months later. The two probes have been zipping around the moon ever since, mapping its gravity field in unprecedented detail. ...
. . . That map has revealed an incredibly pulverized lunar crust, she added, suggesting that the moon, Earth, Mars, Mercury and Venus were pounded by long-ago impacts far more violently than previously thought. ...
... The [craft] will slam into the raised rim of a moon crater at 5:28 p.m. EST Monday, mission team members said Thursday. The probes will impact about 20 seconds apart, with each traveling at 3,760 mph (6,050 kph) or so. ...


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