An measurement of the increase in the wavelength of light often due to the Doppler effect. It is used as a means of more accurately predicting the distances to cosmic objects. Objects with higher observed redshifts are farther away than those with lower redshifts.

A shift in the wavelength of light (or other electromagnetic radiation) toward the red end of the spectrum Schwarzschild black hole - A nonrotating, spherical black hole that has no electric charge

The shift of a spectrum, usually of spectral lines in particular, to longer wavelengths.

Light is emitted at a longer (redder) wavelength in a gravitational field than in the absence of a gravitational field. Earth's gravity induces a gravitational redshift of 1 part in 109; a white dwarf star, about 1 part in 104.

The amount that wavelengths of light and radiation from distant galaxies and quasars are increased because of the expansion of the Universe.

When a distant object moves away from the observer the lines in its spectrum are shifted to longer (redder) wavelengths. This is because of the apparent stretching of the wave of light due to the recession of the object: as a result of this stretching the wave `lengthens' and thus shifts towards the red side of the electromagnetic spectrum. The redshift of an astronomical object is an indication of the speed at which this object is receding. This data, combined with the Hubble Constant, will lead to an estimate of the distance of the object. (See Hubble Law for explanation.) The redshift of an object is symbolised by 'z'.

the shift of spectral lines from an object to longer wavelengths because the object is moving away from the observer. The greater the speed of the object, the greater the redshift will be.

a measurement of the displacement of the lines in the spectrum of an object towards longer than normal laboratory wavelengths

a shift in the frequency of a photon toward lower energy,

see related section] An increase in the wavelength of radiation emitted by a celestial body due to the Doppler effect.

See Doppler Shift.

The shift in energy (or wavelength) of a photon emitted when moving away from an observer; in cosmology, the redshift is a measure of the distance from the observer of the source emitting the photons.

A shift to longer wavelengths of light, typically a Doppler shift caused by the motion of the source away from the observer.

An apparent shift toward longer wavelengths of spectral lines in the radiation emitted by an object caused by motion of the emitting object away from the observer.

When an object, such as a galaxy, is going away from you, the light it puts out appears to become longer in wavelength ­ that is, shifted towards the red (long) end of the spectrum. The faster the object is travelling away, the greater degree of redshift. All galaxies (beyond our local group of galaxies) show redshift, which indicates that the Universe as whole is expanding. Redshift applies to radio waves, and other wavelengths, as well as visible light. It is a special case of the Doppler shift (see above).

A shift toward the longer wavelengths of the optical spectrum due to recessional velocity (the Doppler effect).

The shift of all the spectral lines toward longer wavelengths due to the object's recession as seen from the Earth, this recession, at great distances, is due to the overall expansion of the Universe.

The shift of emitted wavelengths of radiation toward longer wavelengths, caused, in the cosmological setting, by the expansion of the universe between the emission event and the observation (reception) of the radiation at Earth. Larger redshifts are associated with events in the more distant past (and therefore farther away from us). In cosmology, the redshift is represented by the letter z. More.

When a radiating object moves away from us, we observe a redshift in its light, or the light waves it emits are getting longer (shifting to the red part of the spectrum).

An increase in the wavelength of light caused either by the source of the light moving away from the observer or by the expansion of the universe. In an expanding universe galaxies with large redshifts lie at greater distances than galaxies with small redshifts. Redshifts can also be produce by light climbing out of a strong gravitational field such as a black hole.

In astronomy, a shift of spectral lines towards longer wavelengths (lower energies) resulting from an object moving away from the observer. This characteristic is the result of an expanding Universe and the finite speed of light.

The shift of spectral lines towards the red end of the spectrum when the light source is moving away.

When the light an object emits is displaced toward the red end of the spectrum it is said to be redshifted. In general, photons of light that are emitted at a source at one energy and detected by an observer at a lower energy are redshifted. Often, the redshift of an object can be measured by examining atomic absorption or emission lines in its spectrum. Redshifts can be caused by the motion of a source away from an observer. For distant objects, redshifts can be caused by the expansion of the Universe.

Reddening of light as it moves away from us, due to the Doppler effect.

the Doppler shift for objects receding from the Earth causes the wavelengths of light to get longer, and hence shift into the red part of the spectrum. Because of the expansion of the Universe, objects with high redshift are far away, and we see them as they were a long time ago.

a shift toward longer wavelengths of the radiation caused by the emitting object moving away from the observer. When this occurs we see the light from the object become more red. See also Doppler effect.

a shift in the red part of the color spectrum when a star is moving away from the earth.

an increase in the wavelength of light coming from an object due to its motion away from Earth, the expansion of the universe, or a strong gravitational field.

the shift of the spectrum of the radiation coming from a source towards the red, that is towards wavelengths higher than those at which the radiation was emitted, due to the fact that the source moves away from the observer. The opposite event, that is the shift of the light towards the violet end of the spectrum when the source moves approaching the observer, is called "blueshift".

A shifting of the spectral lines of a radiating body toward longer wavelengths in direct proportion to the velocity at which that body moves away from the observer.

A shifting of the spectral lines of a radiating body toward longer wavelengths caused, in this case, by the gravitational field of that body.

The lengthening of a light wave from an object that is moving away from an observer. For example, when a galaxy is traveling away from Earth, its light shifts to the red end of the electromagnetic spectrum.

In physics and astronomy, redshift occurs when the electromagnetic radiation, usually visible light, that is emitted from or reflected off of an object is shifted towards the red end of the electromagnetic spectrum. More generally, redshift is defined as an increase in the wavelength of electromagnetic radiation received by a detector compared with the wavelength emitted by the source. This increase in wavelength corresponds to a decrease in the frequency of the electromagnetic radiation.