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The top documents tagged [local supercluster slide]
The Cosmic Calendar If the entire age of the universe (12.5 billion years) was compressed into one year, humans appeared about six minutes before midnight
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The Structure of the Universe AST 112. Galaxy Groups and Clusters A few galaxies are all by themselves Most belong to groups or clusters Galaxy Groups:
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Types of Galaxies Elliptical: Spiral: Irregular:
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