Astronomers use galactic redshift as a measure of
A) gravity.
B) luminosity.
C) rotation curves.
D) mass.
E) distance.

Name: Astronomers use galactic redshift as a measure of A) gravity. B) luminosity. C) rotation curves. D) mass. E) distance.
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Galactic redshift is used to measure the distance of galaxies from Earth, as it indicates how much the light from a galaxy has been stretched due to the expansion of the universe.

Astronomers Use Galactic Redshift as a Measure of