Image: Triton as seen by Voyager 2. Credit: NASA.
"But in addition to all we’ve learned through our spacecraft, our view of the Solar System has gone from a small number of orbiting planets to huge numbers of objects at vast distances. Fifty years ago, a Kuiper Belt many times more massive than the main asteroid belt was only theory. And the early Solar System models I grew up with never included any representation of a vast cloud of comets all the way out to 50,000 AU.We’ve also begun to learn that liquid water, once thought confined to the Earth, may be plentiful throughout the system
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Vale mesmo a pena ler a nota donde retirei isto.
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