The cosmic background radiation today
A) is present only in galaxies.
B) is present everywhere in the universe.
C) accounts for less of the radiation in the universe than starlight.
D) is visible as a faint glow in the sky on dark nights.

Question

Quizplus · Accepted Answer

The cosmic background radiation is present everywhere in the universe and is one of the strongest pieces of evidence for the Big Bang theory. It is not only present in galaxies but is spread throughout the universe. While it is faint, it is detectable in all directions and accounts for a significant portion of the radiation in the universe. It is not visible as a faint glow in the sky on dark nights to the unaided eye, but it can be measured with specialized equipment such as a radio telescope.

The Cosmic Background Radiation Today