What is Cosmological Redshift?

Cosmological Redshift infographic

Release Date: March 21, 2019 10:00AM (EDT)

Read the Release: 2019-20

Media Use: Copyright

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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.