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Brad_was Brad_was
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5 years ago
Which of the following items would not be considered "dark matter" by astronomers?
A) basketballs
B) black holes
C) weakly interacting massive particles
D) red giants
E) people
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
Authors:
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pkampkam
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5 years ago
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Brad_was Author
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5 years ago
Thank you, thank you, thank you!
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Yesterday
this is exactly what I needed
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2 hours ago
Brilliant
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