QSO
(a) The brightest objects in the Universe, quasars can generate over a trillion times as much light as the Sun from a region little larger than the Solar System. Most are extremely distant, which means that they existed long ago. [C95] ...
QSO - Quasi Stellar Object, also Quasar: QSOs are objects that, at first glance, appear as normal stars. Upon closer inspection, however, QSOs have very large redshifts (i.e.
QSO
QSO stands for Quasi-Stellar Object, and is a newer term for quasars (renamed to include the radio-quiet type of quasar).
The 2dF QSO Redshift Survey provides spectra , field images and other information on 25,000 QSOs gathered using the 2dF instrument on the AAT.
They also occur in the single dimension probed by QSO absorption lines using the Lyman a forest, ...
QSO's are now generally accepted to be very distant galaxies with high redshifts. Moreover, many objects that are high-redshift counterparts to normal nearby galaxies have been idenfitied in many imaging surveys, most notably the Hubble Deep Field.
Quasars are very compact objects - the word "quasar" and the acronym "QSO" are short for "quasi-stellar radio source" and "Quasi-stellar object" respectively, due to their 'star-like' appearance.
A quasar (more recently known as a QSO, ) is a distant star-sized energy source in space with an excess of ultraviolet radiation. Some of these QSO's gives off large amounts of radiation, including radio waves and X-rays (but some are radio-quiet).
False-color image of QSO (CFHQSJ2329-0301), the most distant black hole currently known. In addition to the bright central black hole (white), the image shows the surrounding host galaxy (red). Image: Tomotsugu Goto, University of Hawaii.
quasi-stellar object (QSO) See quasar.
quiet Sun The underlying predictable elements of the Sun's behavior, such as its average photospheric temperature, which do not change in time.
QSO Redshift Histograms for Incremental Apparent Magnitude Samples
SDSS
Black Holes: Gravity's Relentless Pull Award-winning interactive multimedia Web site about the physics and astronomy of black holes from the Space Telescope Science Institute ...
quasi-stellar source (QSS)
Sometimes also called quasi-stellar object (QSO); A stellar-appearing object of very large redshift that is a strong source of radio waves; presumed to be extragalactic and highly luminous.
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Definition: quasi-stellar source (QSS): Sometimes also called quasi-stellar object (QSO A stellar-appearing object of very large redshift that is a strong source of radio waves; presumed to be extragalactic and highly luminous._z_space_z_); ...
Later, when it was found that most objects of the kind do not show radio emission and are mainly detected in the visible part of the spectrum, they started to be called simply "quasi stellar objects," and the acronym QSO began to be used more ...
 See also: Galaxies, Galaxy, Energy, Emission, Quasar
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