Universe Today - Shock Wave in Stephan
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Saved by 1 people (0 private), first by anonymouse user on 2006-03-08
- Maggie_diigo on 2006-03-08 - Tags science
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Shock wave in Stephen's Quintet captured by Spitzer. Image credit: NASA/JPL-Caltech. Click to enlarge
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The titanic shock wave, larger than our own Milky Way galaxy, was detected by the ground-based telescope using visible-light wavelengths. It consists of hot hydrogen gas. As NGC7318b collides with gas spread throughout the cluster, atoms of hydrogen are heated in the shock wave, producing the green glow.
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