Question

Stars and galaxies are redshifted.what does that mean?

Answer 1

[AI-generated answer — Bot GPT 3.5]

Redshift is a phenomenon where the light from an object (such as a star or galaxy) appears to be shifted towards longer wavelengths, which causes it to appear more red. This occurs because the object is moving away from the observer and the light waves are stretched out as they travel through expanding space. The amount of redshift can be used to determine the distance and velocity of objects in the universe. In the case of stars and galaxies, redshift is often used to study the expansion of the universe and the movement of celestial objects.