Questions tagged [cosmic-microwave-background]

Questions about is the electromagnetic radiation remnant from the early stage of the universe, also known as "relic radiation".

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Is there any correlation between the Cosmic Microwave Background (CMB) and the distribution of distant galaxies?

The Cosmic Microwave Background (CMB) is remarkably isotropic but does exhibit a distinct dipolar Doppler shift and also much smaller but measurable fluctuations in intensity and polarization. ...
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Why do scientists assume they can measure the shape of the universe if it is also widely believed to be infinite?

The shape of the universe is the question of whether the universe is flat, has a positive curvature or a negative one. More recently astronomers have compared radiation coming from extremely distant ...