After its lunar mission, NASA’s twin Grail (Gravity Recovery And Interior Laboratory) spacecraft, dubbed Ebb and Flow, were deliberately flown into a mountainside in the Northern region of the Moon at 2228-2230 GMT on 16 December The impact area is to be named after the late US astronaut and first US woman in space, Dr Sally Ride. No imaging of the impact took place. The Grail mission was launched in September 2011 to map the lunar gravitational field using changes in the spacecraft separation to do this. The spacecraft also imaged the surface of the Moon.
Two Grail spacecraft are deliberately crashed into Moon
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