Author Question: How do mass-to-light ratios for the inner regions of galaxies compare to the mass-to-light ratios we ... (Read 165 times)

BRWH · **on:** Jul 27, 2018

How do mass-to-light ratios for the inner regions of galaxies compare to the mass-to-light ratios we find when we look farther from a galaxy's center? What does this tell us about dark matter in galaxies?

What will be an ideal response?

Question 2

General relativity explains gravity as the ________ of spacetime.

Fill in the blank(s) with correct word

Bison · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

The farther we look from a galaxy's center, the higher mass-to-light ratios we find. In fact, this ratio grows as we go from single galaxies to clusters of galaxies. This tells us that mass is concentrated not at the centers of galaxies but in the halos of galaxies and the intergalactic medium.

Answer to Question 2

curvature