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water on comet, Tag
- Were comets the source of Earth’s water? Rosetta spacecraft says “no” Fri, 12 Dec 14, 6:30amThe Rosetta spacecraft is currently orbiting and exploring comet 67P/Churyumov-Gerasimenko—a large mass of rock and ice that it landed the Philae probe on in November—and its newest discovery might give us startling insight...