星座
仙后座
Cassiopeia
The 'W' of the northern sky
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简介
Five bright stars draw a W or an M depending on the season. Cassiopeia lies opposite the Big Dipper with respect to Polaris and helps with orientation when the Dipper is low.
你知道吗？
In 1572 Tycho Brahe observed a supernova there, proving that the starry sky can change.