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Bill McKeeman
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My question is this: is the CMB constant or might it be changing with time?
It's cooling. Very slowly, but it's cooling. It's the glow emitted by the Big Bang, more and more redshifted due to the expansion of the universe. It used to be really, really hot.Bill McKeeman said:My question is this: is the CMB constant or might it be changing with time?
CMBR stands for Cosmic Microwave Background Radiation. It is a type of electromagnetic radiation that is present in the universe and can be detected in all directions.
CMBR is considered to be constant in temperature, meaning that it has remained at the same temperature since it was first detected. However, it is also believed to have changed in frequency and wavelength over time due to the expansion of the universe.
CMBR was first discovered in 1964 by scientists Arno Penzias and Robert Wilson using a radio telescope. They were studying radio waves from space and discovered a constant background noise that they could not explain. After further research, they determined that this noise was CMBR.
CMBR is significant because it is considered to be the oldest light in the universe. It is believed to be leftover radiation from the Big Bang, which is the event that is thought to have created the universe. By studying CMBR, scientists can learn more about the origins and evolution of the universe.
CMBR is used in various scientific research, including cosmology, astrophysics, and particle physics. It has provided evidence for the Big Bang theory and has helped scientists understand the composition and structure of the universe. It is also used to study the expansion of the universe and the formation of galaxies and other celestial bodies.