Latest Quasar Stories

Microquasar Found In Distant Galaxy
2012-12-12 13:35:22

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have found a microquasar in a galaxy far away for the first time, according to a report in the journal Nature. The discovery of the microquasar gives hope that more objects may be found in nearby galaxies, which could give astronomers the opportunity to study them in detail, unraveling some of their mysteries. In a microquasar, a black hole with a mass several times that of the Sun pulls material from its companion star...

First Stars Born Short 750 Million Years After The Big Bang
2012-12-06 12:30:42

April Flowers for redOrbit.com - Your Universe Online The universe has had traces of heavy elements such as carbon and oxygen as far back in time as astronomers have been able to see. Elements such as these were originally churned from the explosion of massive stars. They formed the building blocks for planetary bodies, and eventually for life on Earth. Peering back far in time, a research team from MIT, Caltech, and the University of California at San Diego (UCSD) found matter...

Astronomers Take Starburst Galaxy Census
2012-12-04 13:02:44

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have taken a census of hundreds of previously unseen starburst galaxies, revealing high star-formation rates across the Universe. The team used the European Space Agency's Herschel space observatory and ground-based W. M. Keck Observatory to make the observation. Starburst galaxies give birth to hundreds of solar masses' worth of stars every year, while galaxies like our Milky Way produce only one Sun-like star per year....

Chandra Eyes Most Distant X-ray Jet Ever Observed
2012-11-29 10:00:20

April Flowers for redOrbit.com - Your Universe Online NASA's Chandra X-ray Observatory has detected a jet of X-rays from a supermassive black hole 12.4 billion light years from Earth, making it the most distant X-ray jet ever observed. The jet gives astronomers a glimpse into the explosive activity associated with super massive black hole growth in the early universe. A quasar named GB 1428+4217, or GB 1428 for short, produced the jet of X-rays. The black holes at the center of most...

Cosmic Outflow From Distant Quasar More Powerful Than Ever
2012-11-28 06:09:15

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have reported in The Astrophysical Journal that they have found a quasar with the most energetic outflow ever seen. The quasar, SDSS J1106+1939, is at least five times more powerful than any that have been observed to date. Quasars are bright galactic centers powered by supermassive black holes. These cosmic objects outflows have never been observed as powerful as theorists have predicted, until now. The new study looked...

BOSS Survey Reveals 48,000 Quasars
2012-11-13 10:38:57

Lee Rannals for redOrbit.com - Your Universe Online The Baryon Oscillation Spectroscopic Survey (BOSS) has announced the first major result of a new mapping technique, unveiling over 48,000 quasars. BOSS is the largest program of the third Sloan Digital Sky Survey (SDSS) and is mapping a huge volume of space to measure the role of dark energy in the evolution of the universe. “No technique for dark energy research has been able to probe this ancient era before, a time when...

Bright Flare In A Black Hole
2012-11-06 19:14:34

Lee Rannals for redOrbit.com — Your Universe Online A team of scientists say they have detected the brightest flare ever observed in our galaxy's black hole. The astronomers used NASA´s Chandra X-Ray Observatory to detect the brightest flare ever observed from Sagittarius A*. The black hole is considered to be low-key, emitting very little energy for its size. It gives off about as much energy as the sun, despite it being 4 billion times as massive. The recent flare is...

Distant Quasar Shows No Sign Of Feeding On Galaxy Of Stars
2012-10-24 12:05:36

Lee Rannals for redOrbit.com — Your Universe Online While looking at one of the most distant quasars in the universe, astronomers were surprised to not see an underlying host galaxy of stars feeding it. NASA said the best explanation is that the galaxy is shrouded in so much dust that the stars are completely hidden everywhere. As stars aged and burned out in the early universe, they filled interstellar space with dust as they lost their atmosphere. The quasar dates back to an...

Early Universe Was Full Of Supermassive Black Holes
2012-10-08 12:41:21

Lee Rannals for redOrbit.com - Your Universe Online Scientists have discovered a new population of supermassive black holes in the early universe by using infrared surveys. After traveling 11 billion years, the light from supermassive black hole ULASJ1234+0907 reached Earth. This black hole has more than 10 billion times the mass of the Sun, and 10,000 times the mass of the supermassive black hole in our own Milky Way. The latest research, published in the journal Monthly Notices of...

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...

Latest Quasar Reference Libraries

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...

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...

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...

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...

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
  • A large punch-bowl of the eighteenth century, usually of silver and with a movable rim, and decorated with flutings and a scalloped edge. It was also used for cooling and carrying wine-glasses.
  • A kind of cotton handkerchief having white spots on a colored ground, the spots being produced by a chemical which discharges the color.
This word is possibly named after Monteith (Monteigh), 'an eccentric 17th-century Scotsman who wore a cloak scalloped at the hem.'