"Sunlight is moving northward on Vesta, and we will soon see the north pole regions," Russell said. "What could be there to complement what we see in the south?"
When Dawn finishes up at Vesta, it will start the long trek to the dwarf planet Ceres, which is roughly as wide as Texas. The probe is scheduled to reach the "queen of the asteroid belt" in February 2015 and embark upon a whole new round of discoveries.
"We expect that Ceres is a much wetter world" than Vesta, Russell said. But, he added, "we have no meteorites to help us here. Everything will be a surprise."
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