Latest Quasar Stories

Quasars Illuminate Swirling Clouds Around Galaxies
2014-01-09 08:49:42

A new study of light from quasars has provided astronomers with illuminating insights into the swirling clouds of gas that form stars and galaxies, proving that the clouds can shift and change much more quickly than previously thought.

One-Percent Accurate Measurement Of Universe Completed By BOSS
2014-01-09 09:02:10

Researchers from the Baryon Oscillation Spectroscopic Survey (BOSS) announced on Wednesday that their project has measured the scale of the universe to an accuracy of one percent.

ALMA Observatory Reveals Black Hole's Eating Habits
2013-10-16 10:12:37

New observations from the Atacama Large Millimeter/submillimeter Array (ALMA) in the high-altitude Atacama Desert of Chile have revealed new details about the powerful molecular-gas jets that stream out of supermassive black holes.

Researchers Explain Why Supermassive Black Holes Eat Less Material Than Expected
2013-08-30 08:51:11

A long-standing mystery concerning super massive black holes at the center of galaxies has been solved by a team of astronomers using NASA’s super-sensitive Chandra X-ray space telescope.

Milky Way Gas Cloud Creates Multiple Images Of Distant Quasar
2013-08-29 03:49:01

Using the National Science Foundation's Very Long Baseline Array radio telescope system, astronomers have for the first time managed to capture an image of a distant quasar split into multiple images due to the effects of a cloud of ionized gas in the Milky Way.

Quasar Observed In 6 Separate Light Reflections
2013-08-10 06:17:06

Recently, a team of three 3rd year students studying at the Niels Bohr Institute undertook a week long observation at the Nordic Optical Telescope in La Palma, Spain. Their mission: to take deeper, follow-up observations of a puzzling object that had been recently discovered.

Exploring Hidden Milky Way
2013-08-01 08:48:11

Understanding how the Milky Way formed is one of the central scientific questions in astronomy. Yet given the scale and complexity of the galaxy, there is a lot to consider.

Quasar Radiation Influences Galaxy Growth
2013-07-25 05:58:07

Astrophysicists writing in The Astrophysical Journal have shed some new light on the universe's brightest objects - quasars.

Astronomers Catch Distant Galaxy Snacking On Gas
2013-07-04 13:01:16

Astronomers were able to catch a distant galaxy in the act of snacking on nearby gas while using the European Space Observatory's Very Large Telescope.

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 slit in a tire to drain away surface water and improve traction.
The word 'sipe' comes from Old English and is related to 'seep'.