20 results found for: “quasar_science”.

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Quasar

A quasar (/ˈkweɪzɑːr/ KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO...

Last Update: 2024-03-26T03:35:25Z Word Count : 7894 Synonim Quasar

List of quasars

of quasars. More than a million quasars have been observed, so any list on Wikipedia is necessarily a selection of them. Proper naming of quasars are...

Last Update: 2024-03-13T14:39:27Z Word Count : 4739 Synonim List of quasars

Twin Quasar

The Twin Quasar (also known as Twin QSO, Double Quasar, SBS 0957+561, TXS 0957+561, Q0957+561 or QSO 0957+561 A/B), was discovered in 1979 and was the...

Last Update: 2023-12-17T05:13:25Z Word Count : 1195 Synonim Twin Quasar

Daniel Quasar

Daniel Quasar is an American artist and graphic designer, known for their design of the Progress Pride flag, a variation of the rainbow pride flag that...

Last Update: 2024-02-22T11:28:56Z Word Count : 466 Synonim Daniel Quasar

Large quasar group

A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nuclei) that form what are thought to constitute...

Last Update: 2024-03-12T13:55:04Z Word Count : 664 Synonim Large quasar group

3C 273

3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and...

Last Update: 2024-03-07T19:36:30Z Word Count : 1654 Synonim 3C 273

Videndum

manufacture of robotic camera support products. In April 2021, Vitec acquired Quasar Science, a linear LED tube manufacturer. In May 2022, the company changed its...

Last Update: 2023-06-16T18:15:39Z Word Count : 641 Synonim Videndum

TON 618

Tonantzintla 618) is a hyperluminous, broad-absorption-line, radio-loud quasar and Lyman-alpha blob located near the border of the constellations Canes...

Last Update: 2024-03-15T11:50:27Z Word Count : 1819 Synonim TON 618

Peugeot Quasar

Quasar was the name of the first concept car produced by Peugeot. It was assembled in 1984 at the Peugeot plant in La Garenne, and first displayed at the...

Last Update: 2024-03-12T11:12:31Z Word Count : 590 Synonim Peugeot Quasar

Quasar, Quasar, Burning Bright

Quasar, Quasar, Burning Bright is a collection of seventeen scientific essays by American writer and scientist Isaac Asimov. It was the thirteenth of a...

Last Update: 2021-04-17T17:35:53Z Word Count : 164 Synonim Quasar, Quasar, Burning Bright

QSO J0529-4351

QSO J0529−4351 (SMSS J052915.80–435152.0) is a quasar, 12 billion light-years away in the Pictor constellation, notable for being the brightest of its...

Last Update: 2024-03-26T10:03:17Z Word Count : 257 Synonim QSO J0529-4351

January–March 2023 in science

This article lists a number of significant events in science that have occurred in the first quarter of 2023. 3 January – Researchers report molecular...

Last Update: 2024-03-25T05:43:00Z Word Count : 28831 Synonim January–March 2023 in science

QSO J0313−1806

oldest known quasar at z = 7.64, at the time of its discovery. In January 2021, it was identified as the most redshifted (highest z) known quasar, with the...

Last Update: 2024-02-28T05:47:33Z Word Count : 491 Synonim QSO J0313−1806

2023 in science

discovery was found in studies of UHZ1, a very early galaxy containing a quasar, by the Chandra X-ray Observatory and James Webb Space Telescope. 29 November...

Last Update: 2024-03-25T10:30:13Z Word Count : 44404 Synonim 2023 in science

April–June 2020 in science

respectively. In a preprint astronomers report the discovery of the second oldest quasar, Pōniuāʻena (J1007+2115) that is twice as massive as the oldest one, ULAS...

Last Update: 2024-03-07T05:59:33Z Word Count : 28414 Synonim April–June 2020 in science

Supermassive black hole

the process responsible for powering active galactic nuclei (AGNs) and quasars. Two supermassive black holes have been directly imaged by the Event Horizon...

Last Update: 2024-03-12T20:06:57Z Word Count : 11048 Synonim Supermassive black hole

Jimmy Neutron: Boy Genius

Runaway Rocketboy and starring a prototype character for Jimmy named Johnny Quasar. After revisiting the abandoned script several years later, Davis decided...

Last Update: 2024-03-01T20:11:02Z Word Count : 4355 Synonim Jimmy Neutron: Boy Genius

APM 08279+5255

APM 08279+5255 is a very distant, broad absorption line quasar located in the constellation Lynx. It is magnified and split into multiple images by the...

Last Update: 2024-03-08T17:27:30Z Word Count : 1172 Synonim APM 08279+5255

Universe

Berardelli, Phil (March 25, 2010). "Galaxy Collisions Give Birth to Quasars". Science News. Archived from the original on March 25, 2022. Retrieved July...

Last Update: 2024-03-21T18:54:58Z Word Count : 16620 Synonim Universe

ULAS J1342+0928

ULAS J1342+0928 is the second-most distant known quasar detected and contains the second-most distant and oldest known supermassive black hole, at a reported...

Last Update: 2024-02-28T05:35:03Z Word Count : 1252 Synonim ULAS J1342+0928

Main result

Quasar

A quasar ( KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by a supermassive black hole with a mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc. Gas in the disc falling towards the black hole heats up and releases energy in the form of electromagnetic radiation. The radiant energy of quasars is enormous; the most powerful quasars have luminosities thousands of times greater than that of a galaxy such as the Milky Way. Quasars are usually categorized as a subclass of the more general category of AGN. The redshifts of quasars are of cosmological origin.The term quasar originated as a contraction of "quasi-stellar [star-like] radio source"—because they were first identified during the 1950s as sources of radio-wave emission of unknown physical origin—and when identified in photographic images at visible wavelengths, they resembled faint, star-like points of light. High-resolution images of quasars, particularly from the Hubble Space Telescope, have shown that quasars occur in the centers of galaxies, and that some host galaxies are strongly interacting or merging galaxies. As with other categories of AGN, the observed properties of a quasar depend on many factors, including the mass of the black hole, the rate of gas accretion, the orientation of the accretion disc relative to the observer, the presence or absence of a jet, and the degree of obscuration by gas and dust within the host galaxy. About a million quasars have been identified with reliable spectroscopic redshifts, and between 2-3 million identified in photometric catalogs. The nearest known quasar is about 600 million light-years from Earth. The record for the most distant known quasar continues to change. In 2017, quasar ULAS J1342+0928 was detected at redshift z = 7.54. Light observed from this 800-million-solar-mass quasar was emitted when the universe was only 690 million years old. In 2020, quasar Pōniuāʻena was detected from a time only 700 million years after the Big Bang, and with an estimated mass of 1.5 billion times the mass of the Sun. In early 2021, the quasar QSO J0313–1806, with a 1.6-billion-solar-mass black hole, was reported at z = 7.64, 670 million years after the Big Bang.Quasar discovery surveys have shown that quasar activity was more common in the distant past; the peak epoch was approximately 10 billion years ago. Concentrations of multiple quasars are known as large quasar groups and may constitute some of the largest known structures in the universe if the observed groups are good tracers of mass distribution.


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