News tagged with quasars

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Existence of a group of 'quiet' quasars confirmed

Aeons ago, the universe was different: mergers of galaxies were common and gigantic black holes with masses equivalent to billions of times that of the Sun formed in their nuclei. As they captured the surrounding ...

dateOct 29, 2014 in Astronomy
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Mysterious quasar sequence explained

Quasars are supermassive black holes that live at the center of distant massive galaxies. They shine as the most luminous beacons in the sky across the entire electromagnetic spectrum by rapidly accreting ...

dateSep 10, 2014 in Astronomy
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Image: Hubble shoots Bright Quasar 3C 273

(Phys.org) —This image from Hubble's Wide Field and Planetary Camera 2 (WFPC2) is likely the best of ancient and brilliant quasar 3C 273, which resides in a giant elliptical galaxy in the constellation ...

dateNov 25, 2013 in Astronomy
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New type of black-hole quasar discovered

(Phys.org) —Like our Milky Way, every known large galaxy has at its center a supermassive black hole, some of which are surrounded by a super-bright disk of hot gas called a quasar—but now a research ...

dateNov 08, 2013 in Astronomy
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Brightest beacons

Deep-space missions require precise navigation, in particular when approaching bodies such as Mars, Venus or a comet. How precise?

dateOct 02, 2013 in Astronomy
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Hubble finds source of Magellanic Stream

(Phys.org) —Astronomers using the NASA/ESA Hubble Space Telescope have solved the 40-year-old mystery of the origin of the Magellanic Stream, a long ribbon of gas stretching nearly halfway around the Milky ...

dateAug 08, 2013 in Astronomy
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