Source: http://www.npr.org/2011/12/30/144485204/nasa-probes-to-enter-moons-orbit-over-new-years?ft=1&f=1007
Sunday, January 1, 2012
NASA Probes Set To Orbit The Moon Over New Year's
Twin GRAIL spacecraft on a mission to study lunar gravity are nearing the end of their almost four month journey. The probes are expected to reach the moon on New Year's Eve and New Year's Day. GRAIL's principal investigator, Maria Zuber of MIT talks about the data they hope to collect.
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