Question

Based on galactic rotation curves and cluster dynamics, we think dark matter
A) is a minor component of the entire mass of the universe.
B) is best detected from the X-rays it produces in the intergalactic medium.
C) will have no effect on the fate of the universe.
D) comprises over 90% of the entire mass of the universe.
E) will doom the universe to collapse, overcoming the redshifts we now observe.

Answer

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