SOLAR SYSTEM

Detailed explanation-1: -When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift . Astronomers use redshift and blueshift to deduce how far an object is away from Earth, the concept is key to charting the universe’s expansion.

Detailed explanation-2: -The faster a star moves towards the earth, the more its light is shifted to higher frequencies. In contrast, if a star is moving away from the earth, its light is shifted to lower frequencies on the color spectrum (towards the orange/red/infrared/microwave/radio end of the spectrum).

Detailed explanation-3: -A Doppler red shift indicates that the light source being observed is moving away from the observer. When a light source is moving away from an observer, the light wave gets stretched beyond its normal wavelength. This means the color of light absorbed is closer to the red end of the electromagnetic spectrum.