NASA's twin GRAIL spacecraft now together in lunar orbit

NASA's twin GRAIL spacecraft now together in lunar orbit: "Nasa's twin GRAIL (Gravity Recovery And Interior Laboratory) spacecraft are now in orbit around the Moon. Having achieved lunar orbit at 2 p.m. PST on New Year's Eve, GRAIL-A was joined by GRAIL-B at 2:43 p.m. PST on New Year's Day. The twin spacecraft are now in a near-polar, elliptical orbit with an orbital period of approximately 11.5 hours."

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