Similar comments can be made about the cosmic microwave background.

We check that against the cosmic microwave background, and it seems to hold.

This is far less than the 2.7 K produced by the cosmic microwave background.

The light which constitutes the cosmic microwave background comes from the surface of last scattering.

In 2003, observations of the cosmic microwave background confirmed this discovery.

The cosmic microwave background was initially thought to be isotropic-it's the same where ever you look.

The radio spectrum was silent, except for the hiss and crash of the cosmic background.

The cosmic microwave background is polarized at the level of a few microkelvin.

On 21 March 2013, the mission's all-sky map of the cosmic microwave background was released.

In some ways it is analogous to the cosmic microwave background, but at shorter wavelengths.