NASA: Comets Richer Than Previously Thought

The comet Wild 2

An image of the comet Wild 2, taken by NASA's Stardust spacecraft during a fly-by on Jan. 2, 2004. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

At a NASA press briefing today, scientists said that comets are more than just a loose collection of space rubble. They can be solid bodies with craters and other geological features. The findings come from observations by the Stardust spacecraft, which had a close encounter with the comet Wild 2 in January. NPR's Richard Harris reports.

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