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staedtler staedtler
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7 years ago
Which one of the following statements is true about clusters of galaxies?
A)   The observed mass of the galaxies of the cluster is many thousands of times too small to hold the cluster together.
B)   The observed mass of the galaxies of the cluster is about 10 times larger than the amount needed to hold the cluster together.
C)   The observed visible mass of the galaxies in the cluster is about 10 times too small to hold the cluster together.
D)   The observed mass of the galaxies of the cluster is almost exactly equal to that needed to hold the cluster together.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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staedtler Author
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6 years ago
I really appreciate your help!
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