Twin GRAIL spacecraft to enter lunar orbit in a few days

Wednesday, December 28, 2011

Just a quick heads up for those who remember the launch of GRAIL in September - after an extremely leisurely trajectory (since Earth - Moon usually takes about two to five days), they will enter lunar orbit the day before the new year. Since they use conventional propulsion the entry into lunar orbit will be a nail-biter, but not overly so considering the precision of their trajectory and the fact that they are just 1.2 light seconds away.

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