Quantcast

Latest Black holes Stories

StephenHawkingQuotes_011813
2013-01-18 14:45:24

This month, Oxford’s wheelchair-bound conqueror of the cosmos turns 71. In honor of a life dedicated to the advance of science – both in the theoretical realm as well as in public discourse – redOrbit sifted through some 30 years of books, magazine articles, interviews and speeches to bring you the choicest selection of Stephen Hawking quotes on topics as diverse as God, aliens, philosophy and the nature of space and time.

All Black Holes Launch Fundamentally Similar High-Speed Jets
2012-12-14 11:31:15

A new study shows that high-speed jets launched from active black holes share fundamental similarities despite the mass, age or environment of their originating black hole.

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

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.

Chandra Eyes Mini Supermassive Black Hole
2012-10-25 07:19:58

NASA's Chandra X-ray Observatory has identified one of the lowest mass supermassive black holes ever observed in the middle of a galaxy that one would not expect to harbor this type of beast.

Black Hole Afterburner Moves At The Speed Of Light
2012-10-23 09:02:38

A supersonic jet of material that looks amazingly similar to the afterburner flow of a fighter jet is blasting over two million light-years from the center of a distant galaxy.

Milky Way Black Hole Ready For A Snack
2012-10-23 04:05:24

Scientists have determined that the black hole in the middle of the Milky Way is getting ready to devour an approaching cloud of dust and gas.

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

Scientists have discovered a new population of supermassive black holes in the early universe by using infrared surveys.

Star Discovery Tests Einstein
2012-10-04 20:58:20

Astronomers, using the Keck Observatory, have found the star they need to test Einstein's theory about the fabric of space-time.

Messier 22 Has Two Black Holes
2012-10-03 12:49:09

A surprising black hole discovery made while using the National Science Foundation's Karl G. Jansky Very Large Array (VLA) is causing scientists to change what they know of globular star clusters.


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...

More Articles (6 articles) »
Word of the Day
ponerology
  • An interdisciplinary study of social injustice.
The word 'ponerology' was coined by Andrzej Łobaczewski, a Polish psychiatrist. It comes from a Greek word meaning "evil".