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Latest Quasar Stories

Quasar Clouds Gone With The Wind
2012-10-01 21:45:23

Lee Rannals for redOrbit.com — Your Universe Online The distant quasar gas clouds that seemed to disappear off the grid were gone with the wind, according to a study published in The Astrophysical Journal. Astronomers Nurten Filiz Ak and Niel Brandt of Pennsylvania State University led the team to search for the missing quasar gas clouds that seemed to disappear in just a few years. "We know that many quasars have structures of fast-moving gas caught up in 'quasar winds,' and...

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2012-09-18 17:49:27

Lee Rannals for redOrbit.com — Your Universe Online Researchers are finding ways to map out the spread and structure of the universe through the light of quasars. Scientists have developed a technique that could offer up a never before seen look back to a time just after the Big Bang. They found, while analyzing the visible light from a small group of quasars, that patterns of light variation over time were consistent from one quasar to another when corrected for the celestial...

Early Universe Lit Up By Explosion Of Growth
2012-09-07 05:29:14

April Flowers for redOrbit.com - Your Universe Online A new study from the University of California, Berkeley indicates that the birth of the first massive galaxies that lit up the early universe was an explosive event, happening faster and ending sooner than suspected. Around 13 billion years ago, when the universe was about 750 million years old, extremely bright, active galaxies formed and fully illuminated the universe, according to Oliver Zahn, a postdoctoral fellow at the Berkeley...

Massive Winds Driven By Intense Star Formation
2012-08-22 05:30:05

April Flowers for redOrbit.com - Your Universe Online Fueled by an intense burst of star formation, fierce galactic winds may blow gas right out of massive galaxies, which in turn could shut down their ability to make new stars. A team of astronomers sifted through images and data from three telescopes to find 29 objects with outflowing winds measuring up to 2,500 kilometers per second, an order of magnitude faster than most observed galactic winds. "They're nearly blowing themselves...

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2012-08-08 21:06:45

April Flowers for redOrbit.com - Your Universe Online The largest-ever 3-D map of massive galaxies and distant black holes was released this week in the hopes that it will help explain the mysteries of "dark matter" and "dark energy." This new sky map is the work of the Sloan Digital Sky Survey III (SDSS-111) collaboration. SDSS-III is mission is to map the Milky Way, search for extrasolar planets, and solve the mystery of dark matter. The research team began to gather data in 2008 for...

First Public Data Release From The Baryon Oscillation Spectroscopic Survey (BOSS)
2012-08-08 10:08:02

Led by Berkeley Lab scientists, the Sloan Digital Sky Survey´s BOSS is bigger than all other spectroscopic surveys combined for measuring the universe's large-scale structure The Third Sloan Digital Sky Survey (SDSS-III) has issued Data Release 9 (DR9), the first public release of data from the Baryon Oscillation Spectroscopic Survey (BOSS). In this release BOSS, the largest of SDSS-III's four surveys, provides spectra for 535,995 newly observed galaxies, 102,100 quasars, and 116,474...

Quasar Revealed In Unprecedented Detail
2012-07-18 05:13:54

[ Watch Video 1 ] | [ Watch Video 2 ] | Watch Video 3 ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers have made a crucial step towards a scientific goal by observing the heart of a distant quasar with angular resolution. An international team of astronomers connected radio telescopes in Chile, Hawaii and Arizona for the first time using the technique of Very Long Baseline Interferometry (VLBI), enabling them to make the sharpest observation ever of the center of a...

Dark Galaxies Of The Early Universe Seen For The First Time
2012-07-11 17:25:51

Dark galaxies are small, gas-rich galaxies in the early Universe that are very inefficient at forming stars. They are predicted by theories of galaxy formation and are thought to be the building blocks of today's bright, star-filled galaxies. Astronomers think that they may have fed large galaxies with much of the gas that later formed into the stars that exist today. Because they are essentially devoid of stars, these dark galaxies don't emit much light, making them very hard to detect....

Dark galaxies spotted for the first time
2012-07-11 15:01:14

Lee Rannals for redOrbit.com - Your Universe Online Dark galaxies may have been spotted for the very first time using the European Space Observatory's Very Large Telescope (VLT). An international team of astronomers believe they have detected these elusive objects by observing them as they were lit up by glowing quasars. Dark galaxies are very small, gas-rich galaxies in the early universe that are inefficient at forming stars. Scientists believe these galaxies are building blocks of...


Latest Quasar Reference Libraries

8_2c71772f2c3a31994d5208d4518632495
2004-10-19 04:45:44

Large-Scale Structure of the Cosmos -- Stars are organised into galaxies which in turn appear to form clusters and superclusters, separated by voids. Prior to 1989 it was commonly assumed that the superclusters were the largest structures in existence, and that they were distributed more-or-less uniformly throughout the universe in every direction. However, in 1989, Margaret Geller and John Huchra discovered the "Great Wall", a sheet of galaxies more than 500 million light years long...

6_8304cd2002012eb0093845e374a1b9612
2004-10-19 04:45:42

Supermassive Black Hole -- A Supermassive black hole is a black hole with a mass in the range of millions or billions solar masses. A supermassive black hole has some interesting properties differing from his low-mass cousins: -- The average density of a supermassive black hole can be very low, and actually can be lower than water's density. This happens because the black hole diameter increases linearly with mass, and consequently density drops much faster. -- Strong tidal...

6_c01dfaf162273609e19b80ea97407cf52
2004-10-19 04:45:42

Redshift -- Redshift is the phenomenon that the frequency of light when observed, under certain circumstances, can be lower than the frequency of light when it was emitted at the source. This usually occurs when the source moves away from the observer, as in the Doppler effect. More specifically, the term redshift is used for the observation that the spectrum of light emitted by distant galaxies is shifted to lower frequencies (towards the red end of the spectrum, hence the name) when...

6_c74ddf89e1e986e7de2e5e2451d6b60b2
2004-10-19 04:45:41

Microquasar -- Microquasars are smaller cousins of quasars. They are named after quasars, as they have some common characteristics: strong and variable radio emission often seen as radio jets, and an accretion disk surrounding a black hole. In quasars, the black hole is supermassive (millions of solar masses) as in microquasars, the black hole mass is a few solar masses. In microquasars, the accreted mass comes from a normal star and the accretion disk is very luminous in optical regions...

6_fec4ca0e97baf4ce0833c41b1e6be5e62
2004-10-19 04:45:41

Gravitational Lens -- A gravitational lens is formed when the light from a very distant, bright object (such as a quasar) is "bent" around a massive object (such as a massive galaxy) between the bright object and the viewer. The process is known as gravitational lensing, and was one of the predictions made by Einstein's general relativity. Description In a gravitational lens, the gravity from the massive object bends light as a lens might. As a result, the path of the light from a...

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Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'