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redshift |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.06 sec. |
redshiftDisplacement of the spectrum of an astronomical object toward longer wavelengths (visible light shifts toward the red end of the spectrum). In 1929 Edwin Hubble reported that distant galaxies had redshifts proportionate to their distances (see Hubble's constant). Since redshifts can be caused by motion of an object away from the observer (the Doppler effect), Hubble concluded that all galaxies are receding from each other. This became the cornerstone of theories of an expanding universe. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Previous studies hadn't demonstrated this redshift as clearly. The light, open architecture of the Island Bar in the middle of the Thames in Caversham is emphasised with pin pricks of blue light from Chloe recessed LED fittings from Trilux Lighting (image: Redshift Photography). They analyzed each galaxy's spectrum and something called its redshift. |
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