which statement accurately describes how the understanding of the doppler effect is applied to the study of…

which statement accurately describes how the understanding of the doppler effect is applied to the study of galaxies?\nit was used by hubble to measure the velocities of galaxies.\nit was used to monitor galaxy motion through changes in sound waves.\nit indicates a galaxy moving toward earth through red - shift.\nit indicates a galaxy moving away from earth through blue - shift.

which statement accurately describes how the understanding of the doppler effect is applied to the study of galaxies?\nit was used by hubble to measure the velocities of galaxies.\nit was used to monitor galaxy motion through changes in sound waves.\nit indicates a galaxy moving toward earth through red - shift.\nit indicates a galaxy moving away from earth through blue - shift.

Answer

Brief Explanations:

The Doppler effect was used by Hubble to measure galaxy velocities. Galaxies moving away show red - shift, and those moving towards show blue - shift. Sound waves are not involved in this astronomical context.

Answer:

It was used by Hubble to measure the velocities of galaxies.