Topic: red shift

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red shift

The Columbia Encyclopedia, Sixth Edition
red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect was discovered by V. M. Slipher of Lowell Observatory. Some red shifts are the result of the Doppler effect , i.e., of the relative motion of the earth and the object away from each other. The amount of displacement is a function of the object's recessional velocity relative to the observer. All distant galaxies show a red shift proportional to their distance from the earth as a result... Read more
The Red Shift: Discovering an Expanding Universe
American Decades THE RED SHIFT: DISCOVERING AN EXPANDING ... this category exhibit a red shift. Slipher detected red shifts in thirty-six of ... nebulae exhibited a blue shift, which seemed to mean ... had led to false blue-shift readings. After correcting ... Read more
red shift
World Encyclopedia red shift ( z ) Lengthening of the wavelength of light ... the expansion of the universe (cosmological red shifts). It is defined as the change in the ... results from motion through space; cosmological red shifts are caused by the expansion of space ... Read more

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