Latest Quasars Stories

Astronomers Find Cosmic Lenses With Feeding Black Holes
2012-03-16 02:50:20

In space, it sometimes happens that two galaxies are aligned in just the right way that the closer galaxy distorts and magnifies the appearance of the one behind it. For astronomers, finding these alignments is like coming across giant, cosmic magnifying glasses. Now, a team of astronomers, including Daniel Stern from NASA's Jet Propulsion Laboratory in Pasadena, Calif., has found several rare examples of this phenomenon, called gravitational lensing, in which the foreground galaxy hosts...

2010-07-21 08:10:00

The EPFL's Laboratory of Astrophysics has for the first time observed a quasar that is located between the earth and a more distant galaxy and acts as a gravitational lens A quasar acting as a gravitational lens has now been observed for the first time. This discovery, made by the EPFL's Laboratory of Astrophysics in cooperation with Caltech, represents an advance in the field, since it will allow scientists to weigh and measure a galaxy that contains a quasar. The news is published July 20...

2007-09-14 18:35:40

Astronomers using ESO's Very Large Telescope have discovered in a single pass about a dozen otherwise invisible galaxies halfway across the Universe. The discovery, based on a technique that exploits a first-class instrument, represents a major breakthrough in the field of galaxy 'hunting'. The team of astronomers led by Nicolas Bouch© have used quasars to find these galaxies. Quasars are very distant objects of extreme brilliance, which are used as cosmic beacons that reveal galaxies...

2007-01-09 00:40:00

Using ESO's Very Large Telescope and the W.M. Keck Observatory, astronomers at the Ecole Polytechnique F©d©rale de Lausanne in Switzerland and the California Institute of Technology, USA, have discovered what appears to be the first known triplet of quasars. This close trio of supermassive black holes lies about 10.5 billion light-years away towards the Virgo (The Virgin) constellation. "Quasars are extremely rare objects," says George Djorgovski, from Caltech and leader of the...

2005-09-14 14:19:47

ESA -- The detection of a super massive black hole without a massive host galaxy is the surprising result from a large Hubble and VLT study of quasars. This is the first convincing discovery of such an object. One intriguing explanation is that the host galaxy may be made almost exclusively of dark matter. A team of European astronomers has used two of the most powerful astronomical facilities available, the NASA/ESA Hubble Space Telescope and the ESO Very Large Telescope (VLT) at Cerro...

2005-08-03 12:35:00

JPL -- Most of the biggest black holes in the universe have been eating cosmic meals behind closed doors -- until now. With its sharp infrared eyes, NASA's Spitzer Space Telescope peered through walls of galactic dust to uncover what may be the long-sought missing population of hungry black holes known as quasars. "From past studies using X-rays, we expected there were a lot of hidden quasars, but we couldn't find them," said Alejo Mart'nez-Sansigre of the University of Oxford,...

Latest Quasars Reference Libraries

2004-10-19 04:45:42

Quasar -- A quasar (from quasi-stellar radio source) is an astronomical object that looks like a star in optical telescopes (i.e. it is a point source), but has a very high redshift. The general consensus is that this high redshift is cosmological, the result of Hubble's law and that their redshift indicates that they are typically very distant from Earth; we observe them as they were several billions of years ago. Since we can see them despite their distance, they must emit more...

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Word of the Day
  • A punctuation mark (/) used to separate related items of information.
  • A little rod; a twig.
This word comes from the Late Latin 'virgula,' accentual mark, a diminutive of 'virga,' rod.