cosmic background radiation

Học thuật
Thân thiện
cosmic background radiation

A scientist studies a graph of cosmic background radiation on a computer screen.

Definition
  1. Noun:
    • The cooled remnant of the hot Big Bang: "cosmic background radiation" refers to the faint, uniform electromagnetic radiation that permeates all of space. It is the afterglow of the initial hot, dense state of the universe (the Big Bang), which has cooled over billions of years to an extremely low temperature.
    • A key piece of evidence for the Big Bang theory: Its discovery and properties provide strong observational support for the cosmological model describing the universe's origin and expansion.
Usage Examples
  • Noun:
    • The discovery of the cosmic background radiation was a major confirmation of the Big Bang theory.
    • Scientists study tiny fluctuations in the cosmic background radiation to understand the early universe's structure.
    • The temperature of the cosmic background radiation is remarkably uniform, at about 2.725 degrees above absolute zero.
Advanced Usage

  • "Cosmic Microwave Background (CMB)": This is the most common specific term for the cosmic background radiation, as it is strongest in the microwave region of the electromagnetic spectrum.

    • Precise measurements of the Cosmic Microwave Background have revolutionized cosmology.

  • "Anisotropies in the cosmic background radiation": Refers to the tiny, millionth-of-a-degree temperature variations in the otherwise uniform radiation, which are seeds for galaxy formation.

    • Mapping the anisotropies in the cosmic background radiation is a primary goal of space telescopes like Planck.
Variants and Related Words

  • CMB: A standard abbreviation for Cosmic Microwave Background.

    • The CMB is a snapshot of the infant universe.

  • Cosmic Background Explorer (COBE): The name of a NASA satellite that made pioneering measurements of this radiation.

    • The COBE satellite provided the first detailed map of the cosmic background radiation.
Synonyms
  • Cosmic Microwave Background (CMB): The specific name for the radiation.
  • Relic Radiation: Emphasizes its origin as a remnant from the early universe.
Related Phrases
  • "The afterglow of creation": A poetic or descriptive phrase sometimes used to refer to the cosmic background radiation.
    • Astronomers often call the cosmic background radiation the "afterglow of creation."
cosmic background radiation

A scientist studies a graph of cosmic background radiation on a computer screen.

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

Từ đồng nghĩa