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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 pm PST on New Year’s Eve, GRAIL-A was joined by GRAIL-B at 2:43 pm 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. In readiness for the science phase of the mission which is due to start in March 2012, both spacecraft will undergo a series of burns to place them in a near-polar, near-circular orbit with an altitude of about 34 miles (55 km) and orbital period of just under two hours... Continue Reading NASA's twin GRAIL spacecraft now together in lunar orbit Section: Aero Gizmo Tags: Lunar, Moon, NASA, Orbit, Spacecraft Related Articles: GRAIL mission on final approach to MoonNASA's GRAIL mission will map the Moon's gravityWater found on the moon – what will it mean for the future?Chang'e-1 launch to expand lunar explorationNew NASA pics show Apollo astronauts' footpaths on the moonMESSENGER sends back historic first image of Mercury from orbit
NASA's twin GRAIL spacecraft now together in lunar orbit
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