Red shift is an apparent increase of the wavelength of light toward the red end of the electromagnetic spectrum caused by relative motion between the light-emitting object and an observer. The red shift of light occurs due to relative velocities of...

A red-shift refers to the shifting of wavelengths of energy toward the red end of the color spectrum. In 1842 Christian Johann Doppler determined that if a light source is moving toward or away from an observer, the wavelengths of the light will be...

In physics and astronomy, redshift occurs when the electromagnetic radiation, usually visible light, that is emitted from or reflected off an object is shifted toward the (less energetic) red end of the electromagnetic spectrum. More generally, redshift...

Distant redshifted SNe1a light sources from the Universe that are usually interpreted as cosmological redshifts are shown to be universal gravitational redshifts seen by all observers in the quantum celestial mechanics (QCM) approach to cosmology. The increasingly negative QCM gravitational potential dictates a...

Breaking the redshift-4 barrier For cosmologists, a redshift value of 4 used to seem like the 4-minute mile in footracing. For a long time, in spite of diligent searching, no object with a redshift greater than 4 could be found. Cosmologists wondered...