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发帖数: 1994 | 1 Spiral Galaxy NGC 2997 from VLT
Explanation: NGC 2997 is a grand design spiral galaxy. Its small nucleus and sprawling spiral
arms give it a type Sc designation. NGC 2997, pictured above, is speeding away from us at
about 1100 kilometers per second, which would place it at about 55 million light years distant,
given current estimates of the expansion rate of our universe. NGC 2997 is thought to have a
mass of about 100 billion times that of our Sun, but is probably less massiv |
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