The stability of clusters of galaxies suggests that there is between 10 and 100 times as much dark matter as visible in the galaxies.

Question

Quizplus · Accepted Answer

The stability of galaxy clusters, given their gravitational effects and the velocities of galaxies within them, indicates that there is significantly more mass present than what we can observe directly. This discrepancy is attributed to dark matter, which does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects. Estimates suggest there is about 10 to 100 times as much dark matter as there is visible matter in the universe.

The Stability of Clusters of Galaxies Suggests That There Is