The GRAIL spacecraft are now orbiting the moon -- GRAIL-A arrived on Saturday, GRAIL-B arrived on New Year's Day.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/hsQnnT3C1Rg" height="1" width="1"/>
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The GRAIL spacecraft are now orbiting the moon -- GRAIL-A arrived on Saturday, GRAIL-B arrived on New Year's Day.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/hsQnnT3C1Rg" height="1" width="1"/>