Ancient ice, wet and dry, from deep inside a comet

Bad Astronomy
By Phil Plait
Nov 15, 2010 6:00 PMNov 20, 2019 2:22 AM

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The comet Hartley 2 has come and gone, and the NASA mission EPOXI is also moving on after an exceedingly close flyby of the comet's solid nucleus. The pictures we got were fantastic and beautiful... but their real power comes from coupling them with spectra.

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