Question

4. If a galaxy is moving towards us, what would happen to the wavelengths of light that we see? How

would that change what we see?

Answer 1

Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us. ... When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.