EarthSky What do redshifts tell astronomers?

Redshifts reveal how an object is moving in space, showing otherwise-invisible planets and the movements of galaxies, and the beginnings of our universe.

Hubble Space Telescope 2021 - eoPortal

What is the zodiac? Why is it important in astronomy?

How do astronomers measure the distance light has traveled from a star? - Quora

What is the 'Great Attractor,' and why is it drawing galaxies toward it? - Quora

Demonstrating Energy Levels of Atoms Physics and mathematics, Physics classroom, Energy level

Red Shift Measure 6001

What is the Milky Way? It's our home galaxy

What is redshift in astronomy?

Why does the observation of the night sky indicate that there are many regions of the universe that do not contain any stars? - Quora

The Doppler Effect and Star Spectra - Lesson