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 space between stars and galaxies is almost completely dark.
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.
Cosmic Microwave Background | Center for Astrophysics
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 temperature fluctuations that ultimately resulted in the galaxies we see today.
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 see, was released soon after the Big Bang.
Cosmic microwave background | Electromagnetic Radiation
Cosmic microwave background (CMB), electromagnetic radiation filling the universe that is a residual effect of the big bang 13.8 billion years ago. Because the expanding universe has cooled since this primordial explosion, the background radiation is in the microwave region of the electromagnetic spectrum.
Decoding the cosmic microwave background - Astronomy …
Jul 27, 2018 · The primordial cosmic microwave background (CMB) radiation has since traveled some 13.8 billion years through the expanding cosmos to our telescopes on Earth and above it.
Cosmic Microwave Background - NASA
A group at Princeton was able to identify this radiation as the leftover remnants of the Big Bang, called the Cosmic Microwave Background, or CMB for short.
Cosmic Microwave Background | Origins, Patterns & Significance
May 28, 2024 · Explore the origins, patterns, and significance of the Cosmic Microwave Background (CMB) and how it shapes our understanding of the universe’s history. The Cosmic Microwave Background (CMB) is often considered the afterglow of the Big Bang, the monumental event that gave birth to the universe.
What is the cosmic microwave background radiation?
Nov 1, 2004 · The Cosmic Microwave Background radiation, or CMB for short, is a faint glow of light that fills the universe, falling on Earth from every direction with nearly uniform intensity.
Cosmic microwave background: The universe's oldest light
Jan 3, 2025 · The cosmic microwave background, the oldest light in our universe (Credit: NASA, ESA, and the Planck Collaboration) But there are tiny variations in the CMB carrying vast amounts of information about the very early universe – and those variations also point to the origins of galaxies, stars, planets, and us.