Cosmological redshift is the result of
A)the high speeds at which galaxies move within clusters.
B)the expansion of the universe.
C)very old,red stars in distant galaxies.
D)supermassive black holes.

Question

Quizplus · Accepted Answer

Cosmological redshift is the result of the expansion of the universe. As the universe expands, the light from distant galaxies is stretched, resulting in a shift towards longer wavelengths, which appear as redshifts in spectral lines. This is different from the redshift caused by the motion of galaxies within clusters, known as Doppler redshift. The age or type of stars in galaxies and the presence of supermassive black holes do not have a direct impact on cosmological redshift.

Cosmological Redshift Is the Result of