quasar


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Related to quasar: pulsar, black hole

qua·sar

 (kwā′zär′, -sär′, -zər, -sər)
n.
A compact, extremely bright celestial object whose power output can be hundreds to several thousand times that of the entire Milky Way galaxy. Quasars are among the most distant objects in the universe and are generally considered to be a form of active galactic nucleus.

[From earlier quas(i-stell)ar (radio source).]

quasar

(ˈkweɪzɑː; -sɑː)
n
(Celestial Objects) any of a class of extragalactic objects that emit an immense amount of energy in the form of light, infrared radiation, etc, from a compact source. They are extremely distant and their energy generation is thought to involve a supermassive black hole located in the centre of a galaxy
[C20: quas(i-stell)ar (object)]

qua•sar

(ˈkweɪ zɑr, -zər, -sɑr, -sər)

n.
any of numerous starlike extragalactic objects that may be the most distant and brightest objects in the universe.
[1964; quas(i-stell)ar, in quasi-stellar radio source, the first type of quasar discovered]

qua·sar

(kwā′zär′)
An extremely distant, compact, star-like celestial object. The power output of a quasar is several thousand times that of the Milky Way galaxy.
Did You Know? "The universe is not only stranger than we imagine," Albert Einstein said. "It is stranger than we can imagine." In the 1960s, astronomers found some very strange objects that we now call quasars in the far reaches of the universe. A quasar is like a far-off floodlight. It appears to be an extremely distant star putting out huge amounts of energy. In fact, just one of these objects can be a trillion times brighter than the sun. All of the radiation that a quasar gives off comes from a small area at its center, and many astronomers believe that the source of the energy is an enormous black hole rotating at the center of a young galaxy. Quasars are among the most distant celestial objects known. Some are more than ten billion light-years away, meaning their radiation has taken ten billion years to reach us. So when we look at quasars, we're observing these objects as they were billions of years ago, and we're able to see part of the early history of the universe.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quasar - a starlike object that may send out radio waves and other forms of energy; many have large red shifts
celestial body, heavenly body - natural objects visible in the sky
Translations
كْوازار: جِسْم نَجْمي
kvazar
kvasar
kvazár
dulstirni, kvasi
kvazaras
kvazārs
kvasar
kuazar

quasar

[ˈkweɪzɑːʳ] Ncuasar m, quásar m

quasar

[ˈkweɪzɑːr] nquasar m

quasar

nQuasar m

quasar

[ˈkweɪzɑːʳ] n (Astron) → quasar f inv

quasar

(ˈkweisaː) noun
a star-like object which gives out light and radio waves.
References in periodicals archive ?
This new result suggests that some quasars are even more adept at devouring material than scientists previously knew.
According to a new study published in the British journal "Nature" on Thursday, the quasar is 12 billion times the masses of the Sun and 430 trillion times brighter than the Sun.
DVTEL s Quasar 4K Ultra HD cameras utilize a state-of-the-art, broadcast-quality Ultra HD media processor and deliver four times more detail at full 30 fps than today s best full HD 1080p cameras and legacy 10MP cameras.
The odd-ball heavenly objects called quasars may be much closer to the earth's own Milky Way galaxy than astronomers have thought.
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In this study, the researchers detected the fluorescent glow of hydrogen gas resulting from its illumination by intense radiation from the quasar.
8220;With over 10,000 UV lasers deployed, Spectra-Physics is the leader in UV lasers, and Quasar 355-45 further demonstrates our extensive UV expertise,” says Dave Allen, general manager and senior vice president for Spectra-Physics.
In other words, the pressure of the falling gas and dust may not go such high required for a quasar to emit energy as amount of that emitted by hundred billions of the Sun.
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9 billion light years to be exact - that the light that reached the earth was emitted by the quasar just 770 million years after the Big Bang.
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Professor Geoffrey Burbridge, from the University of California at San Diego, one of the astronomers studying the object, said: ``If this quasar is close by, its red shift cannot be due to the expansion of the universe.