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  1. Cosmic background radiation - Wikipedia

    Cosmic background radiation is electromagnetic radiation that fills all space. The origin of this radiation depends on the region of the spectrum that is observed. One component is the …

  2. Cosmic microwave background | Electromagnetic Radiation

    Dec 12, 2025 · Although neutrinos are now a negligible component of the universe, they form their own cosmic background, which was discovered by WMAP. WMAP also showed that the first …

  3. Cosmic Microwave Background Radiation (CMB or CMBR)

    Aug 25, 2024 · The Cosmic Microwave Background (CMB) or Cosmic Microwave Background Radiation (CMBR) is the residual thermal radiation from the Big Bang, the event that marks the …

  4. ESA - Cosmic Microwave Background (CMB) radiation

    The Cosmic Microwave Background (CMB) is the cooled remnant of the first light that could ever travel freely throughout the Universe. This 'fossil' radiation, the furthest that any telescope can …

  5. Cosmic Microwave Background (CMB) - Fermilab

    Radiation from the Cosmic Microwave Background (CMB) provides a snapshot of the universe at a time only 380,000 years after the Big Bang. The well-understood dynamics of the CMB …

  6. Cosmic Microwave Background | Center for Astrophysics

    Light from that transition could now travel freely, and we see a lot of it today. This light is called the cosmic microwave background (CMB), and it carries information about the very early …

  7. The Cosmic Microwave Background: The Oldest Light in the …

    Mar 24, 2025 · Every atom in your body was forged in stars, and those stars grew from the seeds planted in the fluctuations of the Cosmic Microwave Background. When we study it, we are …

  8. Cosmic Background Radiation - Encyclopedia.com

    After many attempts to account for all extraneous sources of radio noise, they came to the conclusion that there was a general background of radiation at the radio frequency they were …

  9. 29.4 The Cosmic Microwave Background – Astronomy

    This cosmic background radiation image (bottom) is an all-sky map of the CMB as observed by the Planck mission. The colors in the map represent different temperatures: red for warmer …

  10. Cosmic microwave background - Wikipedia

    The cosmic microwave background radiation is an emission of uniform black body thermal energy coming from all directions. Intensity of the CMB is expressed in kelvin (K), the SI unit of …