This unaltered story was originally published by U.S. NASA Space Agency.
URL: https://www.nasa.gov
Content is in public domain.

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What is Cosmological Redshift?

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Date: 2022-03 

About This Image

The universe is expanding, and that expansion stretches light traveling through space in a phenomenon known as cosmological redshift. The greater the redshift, the greater the distance the light has traveled. As a result, telescopes with infrared detectors are needed to see light from the first, most distant galaxies.





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[1] Url: https://webbtelescope.org/contents/media/images/2019/20/4378-Image?Category=02-cosmology&news=true

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