Suppose we look at a photograph of many galaxies. Assuming that all galaxies formed at the same time after the Big Bang, which galaxy appears to us as the youngest?
A)the galaxy that is furthest from us
B)the galaxy that appears bluest to us
C)the galaxy that appears largest to us
D)the galaxy that is closest to us
E)All galaxies would appear to have the same age.

Question

Quizplus · Accepted Answer

The galaxy that is furthest from us appears the youngest because the light from it has taken the longest time to reach us, showing us the galaxy as it was when it was younger.

Suppose We Look at a Photograph of Many Galaxies