Bruce Murray Space Image Library

Hartley 2’s Coma Shadow

Hartley 2’s Coma Shadow
Hartley 2’s Coma Shadow Deep Impact took this photo of Hartley 2 about four minutes before its closest approach. The comet's night side (bottom and left) is silhouetted against the comet's own coma, which scatters sunlight. NASA / JPL-Caltech / UMD

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