When we look at galaxies in the universe and measure their star formation rates, we find that galaxies at redshifts z $\approx$ 1 have higher star formation rates than they do now. At that time, the universe was __________ times the size it is today.
A) 0.1
B) 0.2
C) 0.5
D) 0.7
E) 0.90

Question

Quizplus · Accepted Answer

At redshift z ≈ 1, the universe was about half its current size, as redshift is related to the expansion of the universe.

When We Look at Galaxies in the Universe and Measure ≈\approx≈

When We Look at Galaxies in the Universe and Measure $\approx$