redshift

noun

red·​shift ˈred-ˈshift How to pronounce redshift (audio)
: a displacement of the spectrum of a celestial body toward longer wavelengths that is a consequence of the Doppler effect or the gravitational field of the source
also : a measurement of a celestial body's redshift equal to the ratio of the displacement of a spectral line to its known unshifted wavelength and used especially to calculate the body's distance from earth
redshifted adjective

Examples of redshift in a Sentence

Recent Examples on the Web Located at redshifts of 30 or more, JWST may be incapable of finding them. Big Think, 24 June 2024 Due to that distance, features are hard to resolve, and the redshift caused by the Universe's expansion takes the intense UV radiation from many elements and stretches them deep into the infrared. John Timmer, Ars Technica, 17 June 2024 Galaxies far enough from Earth undergo strong redshifts, with their light’s wavelength being stretched out on the journey to our telescopes by the intervening expansion of space. Phil Plait, Scientific American, 14 June 2024 Even galaxies from just a few hundred million years after the Big Bang (redshifts of 7 and above), which had previously been only observed by Hubble as blobs of light, seem to be being resolved by Webb as having some kind of structure. Georgina Torbet, Ars Technica, 10 June 2024 See all Example Sentences for redshift 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'redshift.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1923, in the meaning defined above

Time Traveler
The first known use of redshift was in 1923

Dictionary Entries Near redshift

Cite this Entry

“Redshift.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/redshift. Accessed 4 Jul. 2024.

Kids Definition

redshift

noun
red·​shift ˈred-ˈshift How to pronounce redshift (audio)
: displacement of a spectrum especially of a heavenly body toward longer wavelengths

More from Merriam-Webster on redshift

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