Puts out tremendous amounts of energy from a very small source. Known as the most intense concentrations of energy in the entire universe, quasars shine with the light of a hundred galaxies, but they are no larger than our solar system.
Class of rare cosmic objects of extreme luminosity and strong radio emission; many investigators attribute their high-energy generation to gas spiraling at high velocity into a massive black hole
A small, extremely bright object at the center of galaxies who's origin is believed to result from the expenditure of large amounts of energy from the surroundings of a giant black hole.
A star-like object in the universe that has a high mass and emits radio waves.
A faint blue, star-like object commonly considered to be extremely distant, probably an unusual nucleus of a galaxy. It has a tendency to flare.
The brightest type of active galactic nucleus, believed to be powered by a supermassive black hole. 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). Thousands of quasars have been observed, all at extreme distances from our galaxy.
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 of these QSO's gives off large amounts of radiation, including radio waves and X-rays (but some are radio-quiet). The word quasar is short for quasi-stellar radio objects. Quasars were first detected by Maartin Schmidt and Allan R. Sandage in 1963 -1964.
Quasar is short for 'quasi-stellar radio source.' Quasars are bright, tiny, distant objects which are 100 to 1000 times as bright as galaxies but are only about as big as a solar system. I J K T U V X Y Z
is a celestial object which appears "star-like" but is not explainable in terms of the usual stellar properties. Many quasars have a visible "tail" - supposedly a jet of material expelled from the quasar. Often quasars emit anomalous amounts of radio waves.
A quasi-stellar radio source. A star-like object that is a powerful producer of radio waves.
An incredibly powerful source of light and radio wave.
Luminous and compact quasi-stellar radio source related to violent events in the nuclei of a galaxy, believed to be powered by a massive black hole.
A star like object that has a large red shift and emits powerful blue light and often radio waves.
An object which appears as a star-like point of light, but emits more energy than an entire galaxy. Many quasars also emit radio waves.
a starlike object that may send out radio waves and other forms of energy; large red shifts imply enormous recession velocities
a baby galaxy, the first stage in its evolution
a compact extragalactic object that looks like a point of light but emits more energy than a hundred supergiant galaxies)
a galaxy with a brilliant, energetic central region, probably powered by a hypermassive black hole that is sucking down enormous quantities of hot gas (an extreme version of what is happening in the center of the Milky Way)
a galaxy with a super massive black hole at its core that is actively gobbling up stars
a kind of Star, but one with new features
an astronomical source of electromagnetic energy, including light, that dwarfs the energy output of the brightest stars
an enormously bright object at the edge of our universe with the appearance of a star when viewed through a telescope
a pointlike source of light in the sky with a high redshift
a quasi-stellar object, a powerful source of light and natural radio energy
a similar object seen in the far reaches of space
a specific type of Active Galactic Nuclei
a star in which the surface plasma is undergoing rapid radial expansion giving rise to population inversion and laser action in some of the atomic species
a star-like object (in terms of its size) which gives out enormous amount of energy
a very bright celestial object, thought to be powered by matter falling into a black hole
quasi-stellar radio source. A very energetic distant object that may be powered by a black hole; possibly a galaxy in the early stages of formation.
Enormously bright objects at the edge of our Universe that emit massive amounts of energy and are likely powered by black holes.
A very dense and very bright object seen in the distant Universe. Quasars are believed to be powered by Black Holes.
Compact, extra galactic, objects at extreme distances, which are highly luminous. They are thought to be active galactic nuclei. The name is an acronym for quasi-stellar radio source. back to the top
A specific type of quasi-stellar source.
"quasi-stellar radio source," possibly the most mysterious (and distant) class of objects in the Universe, identified by their immense production of a wide range of electromagnetic radiation despite their relatively small size
Objects of small angular size and immense power output. Some quasars (quasi-stellar objects, or QSOs) are strong radio sources. Radio-emitting quasars were the first to be discovered. These are some of the most distant objects in the Universe, and are believed to be fueled by supermassive black holes residing in ancient galaxies.
the contraction of the English expression quasi-stellar radio source. These are the farthest objects known, and they are still moving away from us at a very high speed; due to their distance, they are also the youngest objects we can observe, they are only a few billion years old. Quasars emit most of the energy in the radio band, due to the strong redshift. Maybe they are nuclei of active galaxies, much more luminous than the surrounding galaxy, and that is why, in the distance, they appear more like "stars" than like galaxies. Radiative Zone the region of a star in which the energy produced by nuclear fusion in the core is carried outward by radiation. Viceversa, in the convective zone of a star the energy is carried outside by the bulk outward motions of matter.
A quasi-stellar radio source. Quasars are believed to be the active cores of very distant galaxies. 3C 273 in Virgo is the brightest known quasar and is estimated to be more than 1 billion light-years distant.
An exceedingly remote astronomical object which appears like a blue star but which because of the prodigious quantities of energy it radiates may turn out to be galaxy.
galaxy with an extremely luminous nucleus outshining the parent galaxy by several hundred times. They lie billions of light years away and were a feature of the early universe. The energy source of a quasar is probably matter falling into a supermassive black hole.
A type of a quasi-stellar object.
an enormously bright object at the edge of our Universe that emits massive amounts of energy. In an optical telescope, they appear point-like, similar to stars, from which they derive their name. Their high luminosity is created from matter falling into a supermassive black hole in the centers of distant galaxies.
An unusually bright object found in the remote areas of the universe. Quasars release incredible amounts of energy and are among the oldest and farthest objects in the known universe. They may be the nuclei of ancient, active galaxies.
Extremely distant, incredibly luminous objects. They are now accepted to be the exceedingly bright centres of certain galaxies, tiny central cores that put out the power of perhaps a thousand ordinary galaxies.
A distant energy source which gives off vast amounts of radiation, including radio waves and X-rays. RADIO WAVES A type of electromagnetic radiation which has the lowest frequency, the longest wavelength, and is produced by charged particles moving back and forth. Radio waves are not blocked by clouds in the Earth's atmosphere.
the highly energetic core of a young galaxy thought to be powered by a supermassive black hole; short for quasi-stellar object.
An active supermassive black hole that produces so much energy that it outshines all the stars of the galaxy in which it resides. The name derives from the fact that the object resembles a star in photographs of the night sky (quasar stands for 'quasi-stellar object') 3C273 (Quasar)
from QUAsiStellar Radio Source, an object at large redshift (z0.1) showing strong broad emission lines. Variability shows that the energy must arise in a tiny region, although some quasars have hundreds of time the energy output of normal galaxies. Their radio structures often include jets and lobes similar to what we see from radio galaxies.
Object which appears starlike but is very far away and so it is thought to be a galaxy.
The most luminous and some of the most distant of all objects in the universe. They radiate between 10 and 100,000 times as much energy as our entire galaxy from an energy source that measures less than one light-year in diameter. Such a compact source may be a supermassive black hole surrounded by an accretion disk of matter falling into the hole. The matter is heated to millions of degrees, making the accretion disk glow brightly.
the contraction of the English expression quasi-stellar radio source. These are the farthest objects known, and they are still moving away from us at a very high speed; due to their distance, they are also the youngest objects we can observe, they are only a few billion years old. Quasars emit most of the energy in the radio band, due to the strong redshift. Maybe they are nuclei of active galaxies, much more luminous than the surrounding galaxy, and that is why, in the distance, they appear more like "stars" than like galaxies. Radiation Belts collection of charged particles (positive ions and electrons) emitted by the Sun and trapped by the planets magnetosphere. The radiation belts of the Earth are named "Van Allen" belts, after their discoverer.
Short for quasi-stellar radio objects, quasars are starlike objects that may send out radio waves and other forms of energy; many have large red shifts.
abbreviation of "quasi-stellar object". Quasars are unusually energetic objects which emit up to 1,000 times as much energy as an entire galaxy, but from a volume about the size of our solar system.
A starlike celestial object that emits great quantities of light and radio waves; thought to be the ancient exploding origins of new galaxies, quasars are possibly the most distant and oldest observable objects in the universe
Quasi-stellar extragalactic object.
A quasar (contraction of QUASi-stellAR radio source) is an astronomical source of electromagnetic energy, including light. Quasars visible from Earth all show a very high redshift. The scientific consensus is that this high redshift is the result of Hubble's law, meaning that the quasars are very distant.
