What is "redshift"? How did the observation of redshift lead to the development of the Big Bang theory?

A red shift is a phenomenon that indicates the object in light is moving away from the viewer.

The evidence that the universe is shifting away from a central point comes from the observation of the red shift of light.

Explanation:

A red shift is a phenomenon that indicates the object in light is moving away from the viewer.

The Big Bang Theory describes how the universe began.

According to this theory, the universe is shifting away from a central point where is once existed.

The evidence that the universe is shifting away from a central point comes from the observation of the red shift of light. The distance between Earth and the galaxy increases as the light from that galaxy moves towards the Earth.

the answer to the question is "five to eight weeks after the test date"