Background radiation

Background radiation is the level of radiation measured from natural sources in the earth, it's atmosphere or space.

Methods of measuring radiation or ionizing is called Dosimetry. The cosmic microwave background, which is left over from the Big Bang, permeates all of space with a temperature of 2.735 kelvin, as measured by the NASA satellite COBE.

See also:

• Timeline of cosmic microwave background astronomy
• Timeline of other background radiation fields
• Timeline of the Big Bang

External links

• Cosmic Background Radiation