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The Cosmic Microwave Background, or CMB, is a nearly-isotropic 2.725 K signal which formed during the epoch of recombination (when the universe went from being mostly ionized to mostly neutral) approximately 300,000 years after the big bang.

It was first postulated in 1948 by George Gamow, Ralph Alpher and Robert Herman, who predicted its temperature to be approximately 5k. However their work was largely forgotten until Robert Dicke arrived independently at the same prediction in the 1960s. The first publication discussing CMB radiation was in 1964 by two Soviet physicists.

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Which observational tool helped astronomers Arno Penzias and Robert Wilson discover the existence of the cosmic microwave background (CMB)?

radio telescope


What is cosmic microwave back group radiation?

Cosmic Microwave Background (CMB) radiation is the afterglow of the Big Bang, providing a snapshot of the universe approximately 380,000 years after its formation. It is a uniform, faint glow of microwave radiation that fills the universe, with a temperature of about 2.7 Kelvin. The CMB is crucial for understanding the early universe's conditions, revealing information about its composition, structure, and expansion. Its discovery in 1965 provided strong evidence for the Big Bang theory and has since been instrumental in cosmology.


All of space is bathed in microwave energy. where did this energy originatens?

The microwave energy that fills all of space primarily originates from the Big Bang, which occurred approximately 13.8 billion years ago. This energy is a remnant of the hot, dense state of the early universe and is now observed as the Cosmic Microwave Background (CMB) radiation. As the universe expanded and cooled, this radiation stretched and cooled to the microwave wavelengths we detect today. The CMB serves as a crucial piece of evidence for the Big Bang theory and provides insights into the early conditions of the universe.


Any variance in the orbit of a body from its predicted path is called?

Precession


What is a cosmic microwave backround radiation?

Cosmic Microwave Background (CMB) radiation is the afterglow of the Big Bang, filling the universe with a nearly uniform microwave signal. It originated about 380,000 years after the Big Bang, when the universe cooled enough for protons and electrons to combine into hydrogen atoms, allowing photons to travel freely. This radiation provides crucial evidence for the Big Bang theory and offers insights into the early universe's conditions and structure. The CMB is remarkably uniform but exhibits slight fluctuations that reflect the density variations that eventually led to the formation of galaxies.