File:Cosmic_Microwave_Background_(CMB).jpeg · Wikimedia Commons · See Wikimedia Commons
cosmic microwave background
Sign in to saveAlso known as CMBR, MBR, CMB, relic radiation, microwave background radiation, cosmic microwave background radiation, cosmic background radiation
electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology
The cosmic microwave background is leftover radiation from the very early universe, shortly after the Big Bang occurred. Scientists study it because it provides direct evidence about the universe's origin and earliest conditions.
AI-generated from the Wikipedia summary — may contain errors.
~40 min read
Encyclopedic overview
Temperature map of the cosmic microwave background measured by the Planck spacecraft
Expansion · Future
Excerpted from Wikipedia’s “cosmic microwave background” article, available under the CC BY-SA 4.0 licence.
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