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jbrisell jbrisell
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5 years ago
Dark matter in galaxies and clusters of galaxies is purely hypothetical because we have no way of detecting its presence.
A) True
B) False
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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leavemealoneleavemealone
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Posts: 191
5 years ago
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jbrisell Author
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5 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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Helped a lot
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2 hours ago
This site is awesome
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