NASA's Grail mission bit the moondust last month — but images captured by the twin probes' cameras bring the yearlong lunar mission back to life in a two-minute video documenting one of Grail's final go-arounds. Grail's main aim was to map the moon's gravity field, as reflected in the acronym behind the mission title (Gravity Recovery and Interior Laboratory).
There was an educational angle as well, pioneered by Sally Ride, America's first woman in space. As the founder of Sally Ride Science, the late astronaut was in charge of Grail's MoonKam educational project, which let students pick out targets for the black-and-white cameras mounted on the two probes (nicknamed Ebb and Flow). . .