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Comet Chasers Get Serious

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Science  05 Jul 2002:
Vol. 297, Issue 5578, pp. 44-45
DOI: 10.1126/science.297.5578.44

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Summary

Comets, once considered bad omens, might hold the secret of where Earth's water, and even life, came from. Soon we should know much more about them. Scientists are in the process of launching an unprecedented clutch of missions to understand these spectacular visitors from the outer solar system.