Question

define dark matter?


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Answer 1

Answer:

Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about 27% of its total mass–energy density or about 2.241×10−27 kg/m3. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.

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Answer 2

Answer:

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