Answer;
-The light's wavelengths are larger and less frequent, and the star or galaxy is moving away from us.
Explanation;
-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.
For example; doppler redshift occurs if the source of light is moving away from an observer, causing the wavelength of the light to be shifted towards the red due to an apparent increase in wavelength (waves spread). A doppler blueshift occurs if the source of light is moving towards an observer, causing the wavelength of the light to be shifted towards the blue due to an apparent shortening of wavelength (waves squeeze together).
-Visible light is a spectrum of colors, which is clear to anyone who has looked at a rainbow. When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer. If an object moves closer, the light moves to the blue end of the spectrum, as its wavelengths get shorter.
