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- M45 is both known as "The Pleiades" or
- "The Seven Sisters". This is the best
- known open cluster in the sky due to its
- size and brightness. Mentioned frequently
- in ancient writings, the Pleiades contains
- over 250 members, with a dozen visible
- to the naked eye. The entire cluster is
- surrounded by faint wispy bluish
- nebulosity, visually hard to see, but
- dramatic in photographs. In scopes,
- you'll need a low power eyepiece in order
- to capture it in its entirety.