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APOD 22 November 2013
From California to the Pleiades |
This is a picture of the distance between the California Nebula over to the Pleiades. These colors would be too faint for anybody to see in the night sky. The California's reddish color comes from hydrogen atoms ionized by the blue star Xi Persei to its right. The Pleiades star cluster owes its blue color to the reflection of starlight by interstellar dust. In between the nebula and star cluster are the stars of the Perseus OB2 association. I think this provides a really cool view from across the Earth's sky and shows how some nebulae get specific colors.
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