Cosmic Background Radiation

An electromagnetic radiation field at a black body temperature of 2.7 Kelvin that fills the entire universe uniformly to 0.00001 Kelvin. Also known as the Cosmic Microwave Background (CMB), it is thought to be the residual glow from the very hot early universe that followed the Big Bang.

Radio Programs

More Cosmic Background Taking the universe’s temperature Friday, October 2, 2015
Cosmic Background The crackle of the Big Bang Thursday, October 1, 2015
COBE Deciphering the static of the early universe Tuesday, November 18, 2014
Setting a Date Zeroing in on the Big Bang Monday, May 13, 2013

Featured Images

COBE view of the cosmic microwave background
Afterglow Tuesday, November 18, 2014
The Planck space telescope and its view of the cosmic microwave background
Going Dark Thursday, October 24, 2013
The Milky Way galaxy and the afterglow of the Big Bang make up this all-sky imag
A Little of Everything Tuesday, July 6, 2010


©2015 The University of Texas McDonald Observatory