Question

1. how does the concept of redshift help astronomers determine the movement of galaxies? use evidence from image 1 to support your answer.

Explanation:

Redshift occurs when light - emitting objects move away from an observer. In astronomy, the greater the redshift of a galaxy's light, the faster it is moving away. By analyzing the redshift of light from galaxies (such as spectral lines shifting towards the red - end of the spectrum in Image 1), astronomers can determine the direction and speed of a galaxy's movement. If the spectral lines of a galaxy in Image 1 are redshifted, it indicates the galaxy is moving away from us.

Answer:

Redshift is a key concept in astronomy for determining galaxy movement. By analyzing the shift of spectral lines in the light from galaxies (as potentially shown in Image 1), astronomers can tell if a galaxy is moving away (redshifted) or towards (blueshifted) us, and at what speed based on the degree of the shift.