Assuming the universe's expansion had redshifted
the light, this redshift translated to a distance of 2 billion light-years.
If all masses were once lower, and have been constantly increasing, the colours of old galaxies will look redshifted
in comparison to current frequencies, and the amount of redshift is going to be proportionate to their distances from Earth.
Light from a source object is redshifted
because the time interval or scale factor is increased.
Accordingly, the photon's frequency should be redshifted
To detect a galaxy at a given distance from Earth, Lyman-alpha surveys require the detection of but a single redshifted
wavelength of light emitted by hydrogen atoms.
There are two problems: the first galaxies are too faint for Hubble or any existing telescope, and cosmic expansion has redshifted
their visible light even beyond Hubble's new near-infrared capability.
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.
Astronomers use the degree to which a celestial object's light has redshifted
to calculate distance.
Just as a train whistle is Doppler shifted to a lower tone as it passes by, a celestial object's light is redshifted
to longer wavelengths as it recedes.
Observed: The whole quasar or galaxy is intrinsically redshifted
To look for galaxies that reside at particular distances, astronomers pick filters designed to detect specific redshifted
suggests diffuse hydrogen in superclusters between us and the quasars as the source of these features, which are generally less redshifted
than the Lyman-alpha emission line.
Viewed from Earth, infrared light emitted by a galaxy some 13 billion light-years distant gets redshifted
to much longer wavelengths -- into the radio region of the electromagnetic spectrum.
The galaxy is so distant that it doesn't even show up in visible light, presumably because the expansion of the universe has redshifted
its visible light into the infrared part of the spectrum, and because much of its light is absorbed by neutral hydrogen gas en route to Earth.
That discrepancy could have an intriguing explanation: The red galaxies have a structure identical to that of nearby ellipticals, yet they may lie so far away that the visible light they emit has been stretched, or redshifted
, to the infrared.