Just What is Ceres? Dawn is About to Find Out

December 8, 2014 4:09 PM

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NASA's Dawn spacecraft has the protoplanet Ceres in its sight, and soon will have a close encounter with this unusual alien world. Still, before Dawn get's there, it may help to answer some questions such as "what exactly is Ceres?"

Far off in our solar system, you can find the "asteroid belt," a ring of giant chunks of space rock, ice and dust, that separates the orbits of Mars and Jupiter. The core of this main belt extends an average breadth of 113.4 million miles, but understandably thins and expands at certain points aroun...

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