Even though it's three times as far from the sun as Earth, Ceres may have liquid water.
Though unremarkable in size, the asteroid Vesta has an inner glow sure to catch your eye.
Data from the Rosetta mission, the Mars rover and the Herschel space observatory point to water's extraterrestrial origins.
In order to reach Mars, our astronauts may have to stop by a lassoed astroid first.
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