cosmic microwave background radiation

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cosmic microwave background radiation

Scientists study the cosmic microwave background radiation using a space telescope.

Definition
  1. Noun:
    • The cooled remnant of the hot big bang: In cosmology, this is the faint, uniform radiation that fills the entire universe. It is the afterglow of the initial explosion that created the universe, now cooled to an extremely low temperature.
    • A key piece of evidence for the Big Bang theory: The existence and properties of this radiation provide strong observational support for the theory that the universe began in a hot, dense state and has been expanding and cooling ever since.
Examples of Usage
  • Noun:
    • The discovery of the cosmic microwave background radiation was a major breakthrough in cosmology.
    • Scientists study tiny fluctuations in the cosmic microwave background radiation to learn about the early universe.
    • This radiation has an average temperature of about 2.725 kelvin.
Advanced Usage
  • "The CMB": A common abbreviation for "cosmic microwave background radiation."
    • Data from the CMB helps map the large-scale structure of the universe.
  • "CMB anisotropy": Refers to the tiny, observed variations in the temperature of the cosmic microwave background radiation across the sky.
    • The pattern of CMB anisotropy holds clues about the universe's composition and evolution.
Variants and Related Words
  • Cosmic microwave background (CMB) (n): A shortened, more common form of the term.
    • The cosmic microwave background is a cornerstone of modern cosmology.
  • Cosmic background radiation (n): A broader term that can include other wavelengths, but often used synonymously with the microwave component.
    • The cosmic background radiation is a relic of the universe's hot beginning.
Synonyms
  • Relic radiation: Emphasizes its origin as a remnant from the early universe.
  • 3K background radiation: A historical name referencing its approximate temperature of 3 kelvin.
Related Phrases
  • "Primordial radiation": Another term highlighting its origin from the primordial (earliest) phase of the universe.
    • The cosmic microwave background is a form of primordial radiation.
cosmic microwave background radiation

Scientists study the cosmic microwave background radiation using a space telescope.

Noun
  1. (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin

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