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Latest Black holes Stories

black hole
2012-09-18 05:29:06

April Flowers for redOrbit.com - Your Universe Online Recent research from the University of Cardiff has found that the dying tones of black holes reveal the cosmic crash that caused them to form. Black holes are regions of space where gravity is so strong that not even light can escape. Usually, they are the evolutionary ending of stars that were 10 to 15 times larger than our sun. After these stars undergo a supernova event, sometimes the remnant will collapse in on itself, creating a...

Top Physicists Come To Jerusalem To Mark 40 Years Since Jacob Bekenstein’s Famous Essay On The Entropy Of Black Holes
2012-09-04 09:53:43

Speakers include Nobel laureate and winner of new $3 million physics prize As the scientific community marks 40 years since the publication of Prof. Jacob Bekenstein's famous paper on black hole entropy, the Hebrew University of Jerusalem´s Institute for Advanced Studies is celebrating the occasion by hosting an international conference featuring the world´s top theoretical physicists. The Sep. 3-7 conference, Forty Years of Black Hole Thermodynamics, is presented in cooperation...

X-ray Signal Detected During Black Hole's Destruction Of Passing Star
2012-08-03 15:48:00

[Watch Video] Lee Rannals for redOrbit.com — Your Universe Online Astronomers have identified an X-ray signal that followed an observation made last year of a quiescent black hole in a distant galaxy. The black hole discovered by the team last year was seen erupting after shredding and consuming a passing star. Astronomers then witnessed days following the observation a distinctive X-ray signal that comes from matter on the verge of falling into the black hole. This...

Black Holes Need Diet Rich In Stars To Grow
2012-07-20 12:21:35

Lawrence LeBlond for redOrbit.com - Your Universe Online Researchers from several American institutes and agencies have developed a new model showing how an elusive type of black hole can be formed in the gas surrounding their supermassive counterparts. The scientists, from the American Museum of Natural History (AMNH), the City University of New York (CUNY), the Jet Propulsion Laboratory (JPL) of the California Institute of Technology (Caltech), and the Harvard-Smithsonian Center for...

Belching Black Hole
2012-07-09 11:03:28

Observations with CSIRO's Australia Telescope Compact Array have confirmed that astronomers have found the first known "middleweight" black hole. Outbursts of super-hot gas observed with a CSIRO radio telescope have clinched the identity of the first known "middleweight" black hole, Science Express reports online today. Called HLX-1 ("hyper-luminous X-ray source 1"), the black hole lies in a galaxy called ESO 243-49, about 300 million light-years away. Before it was found,...

space-070612-004
2012-07-06 12:37:40

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have spotted the first known "middleweight" black hole, according to a publication in Science Express. The black hole was found with a CSIRO radio telescope in a galaxy called ESO 243-49, which is about 300 million light-years away. Before the black hole was found, astronomers had only known of supermassive black holes and "stellar mass" ones. "This is the first object that we're really sure is an intermediate-mass...

Growth Found to be Out of Synch For Black Hole
2012-06-12 11:42:59

New evidence from NASA's Chandra X-ray Observatory challenges prevailing ideas about how supermassive black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole and the bulge of stars at the center of its host galaxy grow at the same rate -- the bigger the bulge, the bigger the black hole. A new study of Chandra data has revealed two nearby galaxies whose supermassive black holes are growing faster than the galaxies themselves. The mass of a...

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2012-06-07 19:11:03

Lee Rannals for redOrbit.com New research published in the journal Monthly Notices of the Royal Astronomical Society indicates that black holes are able to change gears, similar to an engine. Black holes are able to swallow up matter, and return a lot of energy to the Universe in exchange for the mass they eat. When a black hole attracts mass, they trigger the release of intense X-ray radiation and power strong jets.  However, scientists have been baffled because not all black...


Latest Black holes Reference Libraries

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_c7a74d948ad4cfdc1dd54ceada2509fb2
2004-10-19 04:45:42

Seyfert Galaxy -- Seyfert galaxies are spiral or irregular galaxies containing an extremely bright nucleus, most likely caused by a supermassive black hole, that can sometimes outshine the surrounding galaxy. The light from the central nucleus varies in less than a year, which implies that the emitting region must be less than one light year across. They are named for the astronomer Carl Seyfert, who studied them extensively in the 1940s. They are a subclass of active galactic nuclei....

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_dde8e3a7b796854344845d4924071ec02
2004-10-19 04:45:41

Event Horizon -- The event horizon is a boundary beyond which information will never reach an observer. An event horizon is a mathematical construct and not a physical object and a person passing through an event horizon will not notice any odd behavior. From an outside observer however, an object passing though an event horizon will appear redder and dimmer and will appear to freeze at the moment the object passes the event horizon. An event horizon can form around a gravitational...

6_b46a7f5db9971f5c25f9ce10495a1e9e2
2004-10-19 04:45:41

Black Hole -- Black holes are objects so dense that not even light can escape their gravity. They are believed to form from the gravitational collapse of astronomical objects containing two or more solar masses. Astronomical observations suggest that the center of most galaxies, including our own Milky Way, contain supermassive black holes containing millions to billions of solar masses. Black holes are predictions of Einstein's theory of general relativity. In particular, they occur...

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Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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