Which of the following does NOT support the existence of dark matter?
A) a super massive black hole at the galactic center
B) observed galactic rotation curves
C) the distribution of light in a galaxy
D) X-ray-emitting gas in elliptical galaxies

Question

Quizplus · Accepted Answer

Supermassive black holes at the galactic center do not directly support the existence of dark matter. The evidence for dark matter includes the discrepancy between the observed rotation curves of galaxies and the predicted curves based on visible matter, the distribution of light in galaxies indicating more mass than can be accounted for by visible matter, and the presence of hot X-ray-emitting gas in elliptical galaxies suggesting a gravitational influence from unseen mass. Supermassive black holes, while contributing to the mass of a galaxy, do not provide evidence for the existence of dark matter in the same way these other observations do.

Which of the Following Does NOT Support the Existence of Dark