What is the temperature of the universe (as a whole)today?
A)3000 K
B)3 K
C)300 K
D)The universe cannot be said to have a single temperature.

Question

Quizplus · Accepted Answer

The temperature of the universe as a whole today is approximately 3 K. This is the result of the cosmic microwave background radiation left over from the Big Bang, which has cooled as the universe has expanded. However, it should be noted that certain regions of the universe can have significantly different temperatures due to the presence of stars, galaxies, and other sources of radiation.

What Is the Temperature of the Universe (As a Whole)today