How can scientists estimate the age of the universe? How does this estimate take into account Einstein's Theory of Relativity?

Question

How can scientists estimate the age of the universe?   How does this estimate take into account Einstein's Theory of Relativity?

Hazel Asher · Accepted Answer

The scientists use the size of the universe and the speed of light.
This doesn't take into account Einstein's complete theory of Relativity.

An estimate of the universe's age can be obtained by dividing the estimated size of the universe by the speed of light. Accounting the theory of relativity the speed of light is a constant so the speed of light can not change. It makes sense that # D/V = T# Since # Vxx T = D# This makes perfect sense at normal Velocities. The fact that time is relative according to Einstein's theory of relativity—a photon can be created millions of light years away and appear somewhere else instantly—means that although the speed of light is constant, the time it takes for it to travel is not. This is something that these calculations overlooked.

Levi Acosta · Answer

undefined The cosmic microwave background radiation and the rate of universe expansion are the main methods used by scientists to estimate the age of the universe. This estimate incorporates the concept of spacetime curvature, which affects the geometry of the universe on large scales, and takes into account Einstein's Theory of Relativity by taking into account the effect of gravity on the universe's expansion.