星云
蟹状星云 (M1)
Crab Nebula (M1)
The remains of a supernova seen in 1054
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简介
The Crab Nebula is what remains of an exploded star recorded by Chinese astronomers in 1054. At its centre spins a pulsar, a neutron star turning about 30 times a second.
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It is the first object in Charles Messier's catalogue.