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NASA's twin gravity-mapping moon probes received new names Tuesday (Jan. 17), reflecting their mission to study the changing pull of Earth's natural satellite.
Now to be called "Ebb" and "Flow," the tandem Gravity Recovery And Interior Laboratory (or Grail) spacecraft arrived in lunar orbit over the New Year weekend and were previously referred to simply as "A" and "B". Their new names were offered by fourth grade students in Bozeman, Mont., who were chosen as the winners of NASA's naming contest.
According to NASA, about 900 classrooms with more than 11,000 students from 45 states — as well as Puerto Rico and the District of Columbia — suggested names. The contest was open to U.S. students in kindergarten through 12th grade and began about a month after the probes were launched last September and ran through Nov. 11.