Stephan’s Quintet sounds like the name of a nice jazz group, but this galactic cluster, discovered 250 years ago, is actually one galaxy passing through four others at nearly 2 million miles per hour. Hence the long tails. [Chandra Observatory]
Stephan’s Quintet sounds like the name of a nice jazz group, but this galactic cluster, discovered 250 years ago, is actually one galaxy passing through four others at nearly 2 million miles per hour. Hence the long tails. [Chandra Observatory]
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