After orbiting Vesta and then Ceres, the first time one human-built spacecraft has orbited two different astronomical bodies, the Dawn spacecraft has gone quiet because the exhaustion of its maneuvering fuel meant that it couldn't point its antenna at Earth.
Amazing mission, and we learned a lot, but the highlight was figuring out that the bright white deposits on Ceres are made of salt.
So, good night and good flight, Dawn.
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