Dec. 1 Astronomy Picture: The Pleiades Star Clust# Astronomy - 天文
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Explanation: It is the most famous star cluster on the sky. The Pleiades can
be seen without binoculars from even the depths of a light-polluted city.
Also known as the Seven Sisters and M45, the Pleiades is one of the brightest
and closest open clusters. The Pleiades contains over 3000 stars, is about
400 light years away, and only 13 light years across. Quite evident in the
above photograph are the blue reflection nebulae that surround the bright
cluster stars. Low mass, faint, brown dwarfs ha
be seen without binoculars from even the depths of a light-polluted city.
Also known as the Seven Sisters and M45, the Pleiades is one of the brightest
and closest open clusters. The Pleiades contains over 3000 stars, is about
400 light years away, and only 13 light years across. Quite evident in the
above photograph are the blue reflection nebulae that surround the bright
cluster stars. Low mass, faint, brown dwarfs ha