Quasi-stellar Object
Related Category: Astronomy: General
see quasar.
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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.
Quasi-Stellar Object (Quasar)
Q-Branch
A set of lines in the spectra of molecules corresponding to changes in vibrational energy with none in rotational energy. [H76]
QE Pinned ...
quasi-stellar object - (n.)
Any of a class of extragalactic objects also known as quasars, characterized by emission lines with very large redshifts.
Quasi-Stellar Object
Sometimes also called quasi-stellar source, this is a star-like object with a large redshift that gives off a strong source of radio waves. They are highly luminous and presumed to be extragalactic.
R ...
Short for 'quasi-stellar object'; mysterious distant objects in the universe, which are powerful sources of radio waves and light
radiation
Electromagnetic waves or particles which travel through space carrying energy. Some forms are dangerous ...
Quasar: From quasi-stellar object, a star-like (i.e. unresolved) object that has a very large luminosity and is located at very large distances from us (as indicated by their high cosmological redshifts).
Quasar -- Quasi-stellar object observed mainly in radio waves. Quasars are extragalactic objects believed to be the very distant centers of active galaxies.
RA -- Right Ascension.
QSO
QSO stands for Quasi-Stellar Object, and is a newer term for quasars (renamed to include the radio-quiet type of quasar).
A Revised and Updated Catalog of Quasi-Stellar Objects, Hewitt and Burbidge 1993, APJSuppl 87, 451. Basic data and citations for 7225 QSOs and 90 BL Lac objects.
Optical Catalog of Radio Galaxies, Burbidge and Crowne 1979, APJSuppl 40, 583.
Quasar is a shortening of " source", and they've also been called quasi-stellar objects or QSOs. In the late 50s, several radio sources were matched with very dim optical objects that looked like , but had strange spectra with a lot of excess.
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.
This prototype of a subclass of quasi-stellar objects seems like an ordinary faint star lost in the rich background of the Milky Way about 5°10' W of 6 Lacertae (see negative image and finder chart below).
Another kind of interesting objects is quasar, which is the short form of the quasi-stellar object. When observed in visible light, they are small and dim, just like a star. However, near the infrared and radio, they are quite bright.
For example, the Third Cambridge Catalogue of Radio Sources (3C) 1959 helped lead to the discovery of the first quasi-stellar object (quasar).
A quasar (more recently known as a QSO, Quasi-Stellar Object) is a distant star-sized energy source in space with excess of ultraviolet.
Some quasars (quasi-stellar objects, or QSOs) are strong radio sources. Radio-emitting quasars were the first to be discovered.
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_); ...
It is in fact the prototypical blazar (blazing quasi-stellar object), a highly compact quasar associated with a supermassive black hole presumed to be lying at the core of an active giant elliptical galaxy.
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.
the highly energetic core of a young galaxy thought to be powered by a supermassive black hole; short for quasi-stellar object
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Later it was found that not all (actually only 10% or so) quasars have strong radio emission (are 'radio-loud'). Hence the name 'QSO' (quasi-stellar object) is used (in addition to 'quasar') to refer to these objects, ...
The term quasar is actually a contraction of the term quasi-stellar object or QSO. The image on the right shows a quasar on a field with some stars.
5 degrees northeast of eta Virginis. The name comes from "quasi-stellar object". A single quasar can emit more energy than a hundred galaxies, emitted (in the most part) in the form of infared radiation.
The word "quasar" is derived from quasi-stellar radio source, because this type of object was first identified as a kind of radio source. Quasars also are called quasi-stellar objects (QSOs).
well as strong radio emission observed at extremely great distances. The term is also often applied to closely related objects that have the same optical appearance but that are radio quiet--the so-called QSOs, which stands for "quasi-stellar objects.
emitters and often show complex lobe structure extending for millions of light years. Other galaxies have such energetic nuclei that we only see the bright nucleus and not the underlying galaxy; we call these objects quasars (quasi-stellar objects).
which results in (1) the strong distortion of background galaxy images (arcs) behind some massive foreground galaxy clusters, and (2) multiple images of the same background quasar behind a foreground galaxy. Over 50 lensed quasi-stellar objects are ...
 See also: Quasar, Quasars, Galaxy, Star, Universe
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