About 19,900 results
Open links in new tab
  1. Cosmic microwave background - Wikipedia

    The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background …

  2. Cosmic microwave background | Electromagnetic Radiation

    Dec 12, 2025 · Beginning in 1948, the American cosmologist George Gamow and his coworkers, Ralph Alpher and Robert Herman, investigated the idea that the chemical elements might …

  3. Cosmic Microwave Background | Center for Astrophysics

    Sep 4, 2024 · The cosmic microwave background is a snapshot of the oldest light in our universe, from when the cosmos was just 380,000 years old. The colors of the map represent small …

  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 Radiation (CMB or CMBR)

    Aug 25, 2024 · Learn about the cosmic microwave background radiation (CMB or CMBR), including what it is and why it is important in cosmology.

  6. The Cosmic Microwave Background Explained - YouTube

    This video explores the Cosmic Microwave Background (CMB), explaining how a mysterious hiss of static on a 1960s radio antenna revealed the 13.8-billion-year-old "baby picture" of our …

  7. The Cosmic Echo: How the Microwave Background Supports the …

    The Cosmic Microwave Background (CMB) is the remnant radiation from the early universe, specifically from about 380,000 years after the Big Bang. During this time, the universe cooled …

  8. 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 …

  9. What is the cosmic microwave background? | Space

    Jan 28, 2022 · The cosmic microwave background (CMB) is primeval radiation emitted shortly after the Big Bang. Regarded as an 'echo' of the Big Bang, CMB fills the universe.

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

    Mar 24, 2025 · What was once bright visible light has shifted to microwave radiation, becoming the faint glow we now call the Cosmic Microwave Background. Fast forward to the 1960s.