|
Home > News > Tags > quasars
|
|
30
Extremely bright quasars could degenerate into supermassive black holes over the course of billions of years, experts say after studying a pair of dark behemoths that exceed any other known black hole in terms of mass and size.
Quasars are the highly-active cores of distant active galactic nuclei, and they can be... |
10 December 2011
06:59 GMT |
 |
|
Ever since astrophysicists started analyzing black holes in more details, a number of questions popped up in their heads. Chief among them was a puzzling mystery, the inability to explain why the masses of black holes and their parent galaxies were linked. A new study seeks to clarify the issue.
In fact, this ques... |
6 September 2011
16:01 GMT |
|
|
Experts announce the discovery of 140 trillion times more water than our entire planet holds, in an enormous cloud surrounding a quasi-stellar radio source (quasar). Astronomers say that this is the largest and oldest water cloud ever discovered in the Universe.
According to early estimates, the cloud is about 12 ... |
23 July 2011
02:12 GMT |
|
|
Astronomers at the Brigham Young University (BYU) determined in a new study that black holes at the core of massive galaxies are able to move laterally through their hosts too. Until now, experts believed that the dark behemoths were simply spinning at galactic centers, traveling alongside their hosts. Interestingly... |
21 July 2011
05:15 GMT |
|
|
The fine-structure constant of the Universe, known as alpha, may not be so constant throughout the Universe, experts proposed after an in-depth analysis of light emanating from quasars located far away.Quasars (quasi-stellar radio sources) are the extremely distant and highly active cores of galaxies, which astrophys... |
31 May 2011
05:10 GMT |
|
|
A team of astronomers announces the completion of the most impressive, complete and thorough three-dimensional map of the distant Cosmos ever created. The new dataset was created using an unusual technique, and does not feature galaxies.Rather than looking at starlight coming from these large-scale structures, the sc... |
2 May 2011
03:14 GMT |
|
|
A study of a very distant quasar has finally enabled astronomers to peer back into what experts refer to as the “Dark Ages” of the Universe, a time shortly after the Big Bang when light was scarce. The fact that light was not being produced in large amounts means that there are no residual radiation for o... |
29 April 2011
05:46 GMT |
|
|
A form of cosmic climate change apparently took place in the early Universe, according to the conclusions of a new scientific study on the matter. The temperature of gases billions of years ago began to rise, and continued to do so for a long time – now researchers are wondering why. Astrophysicists say that th... |
17 March 2011
10:36 GMT |
|
|
A team of astronomers has determined that even the Universe's largest black holes are capable of limiting their own growth, through a very simple mechanism. They engulf surrounding matter with such speed and greed, that they cast away large amounts of material in the process.
This is the discovery the group ... |
2 March 2011
02:45 GMT |
|
|
A collaboration of astronomers announces the creation of a series of maps that detail the distribution of dark matter throughout some of the largest galaxies in the known Universe. The elusive stuff cannot be detected directly, but its presence can be inferred from its gravitational pull on normal matter. With the ne... |
14 January 2011
03:06 GMT |
|
|
The general public has been granted access to the most detailed color image of the sky ever to be produced. The image was presented on January 11 in Seattle, at the 217th winter meeting of the American Astronomical Society (AAS 2011).
According to the experts who compiled this monumental work, the image contains m... |
14 January 2011
02:49 GMT |
|
|
A team of astronomers reveals a new method of analyzing the way the Universe looked like during its dark ages. Since there was no light in the Cosmos at that time, there is no way to analyze it, except looking at the leftover glow left behind by the most ancient stars that ever appeared.After the Big Bang took place,... |
6 January 2011
04:50 GMT |
|
|
A group of astronomers using some of the most advanced telescopes in the world were recently able to discover a cosmic structure that has about the same size as our massive galaxy, the Milky Way, without being a galaxy or a cluster. Scientists say that the formation is made up of gas jets and other emissions coming i... |
3 January 2011
09:03 GMT |
|
|
Astronomers in the United Kingdom have recently started the e-Merlin telescope array, which is the newest to be opened in the country. As part of the observatory's first light studies, experts were able to study the jet emissions of a supermassive black holes.The jets the team analyzed were coming from the highl... |
22 December 2010
04:26 GMT |
|
|
According to a new series of measurements, it would appear that the magnetic field inside our planet's core is about 50 times stronger than the one we can measure at its surface. This is the first time that such an investigation was conducted.
A team of experts measured this planetary trait at a depth of no ... |
18 December 2010
04:43 GMT |
|
|
Using the NASA Chandra X-ray Observatory, a team of investigators was able to identify a very distant galaxy cluster that features an unusually-cold core. By all estimates, a quasar must be contained within. The peculiar cosmic structure lies about 8 billion light-years away, which means that it appeared when the Uni... |
7 December 2010
08:33 GMT |
|
|
Studies now show that the early Universe became sick when it was very young, when it sprung a fever as temperatures soared. The finding goes against all models of how the Cosmos evolved, which showed that temperatures dropped as time passed. The largest temperatures existed in the Universe when the Big Bang took plac... |
4 November 2010
02:58 GMT |
|
|
A team of astronomers announces the discovery of a very rare type of cosmic structure, a dead quasar, in a galaxy located close to the Milky Way. Very few space bodies of this type have been discovered until now. Quasi-stellar radio sources (quasars) are the most luminous objects in the Universe, and are essentially ... |
3 November 2010
03:55 GMT |
|
|
In their investigations of a very distant galactic cluster, astronomers managed to determine that an impressive quasar lies at the very core of the structure, surrounded by a bright envelope of relatively cool gas. The quasi-stellar radio source (quasar) is called 3C 186, and it was discovered using the American spac... |
28 October 2010
04:08 GMT |
|
|
In a new set of investigations, scientists discovered that quasars emitted massive blasts of radiation in the early Universe, essentially delaying the growth of dwarf galaxies by as much as 500 million years.This period of accelerated universal warming took place an estimated 11 billion years ago, according to data c... |
8 October 2010
01:44 GMT |
|
|
There are many peculiar types of objects in the Universe, but a quasar tends to overcome most of them in terms of weirdness. Scientists describe it as the highly-active area around a supermassive black hole that is capable of gobbling up matter from its surroundings at a frantic rate, while at the same time emitting ... |
26 March 2010
04:47 GMT |
|
|
In their survey of the skies, astronomers managed to discover a pair of black holes so distant, that they believed to have formed a relatively short period of time after the Big Bang exploded the Universe into being. The announcement was made on Wednesday, March 17, by experts at the University of Arizona. Details of... |
18 March 2010
05:26 GMT |
|
|
Since quasars (quasi-stellar radio sources) were first identified, a scientific debate has erupted over how to best define these space structures. Some understand them as being highly energetic and distant galaxies that have an active nucleus, whereas most think that they are the compact regions in the center of larg... |
13 February 2010
07:04 GMT |
|
|
Astronomers have known for quite some time that the core of large galaxies across the Universe host impressively large, supermassive black holes, behemoths of the skies with millions of times the mass of our own Sun. Now, with the help of the twin W. M. Keck Observatory telescopes, scientists at the University of Cal... |
11 December 2009
16:01 GMT |
|
|
Ever since scientists first attempted to combine quantum mechanics with the theory of general relativity, there were those among them who argued that space and time (spacetime) was quantized at the Planck scale. As far back as the 1960s, expert John Wheeler devised a new word to explain the quantization of the struct... |
9 December 2009
18:01 GMT |
|
|
Experts have known for a long time that at the heart of very large galaxies lie supermassive black holes, with a mass several millions of times that of our own Sun. Since they learned this, astronomers have been trying to establish causal relationships between the two, as in which of the structures triggers the forma... |
30 November 2009
08:28 GMT |
|
|
The NASA-operated Fermi Gamma-ray Space Telescope has taken a deeper look into a very peculiar binary system, known as Cyngus X-3. It has discovered, in premiere, unambiguous evidence that high-energy gamma-rays are being produced by the structure, something that no other observatory was able to say for certain until... |
27 November 2009
04:21 GMT |
|
|
Starting yesterday, November 18, a large number of space telescopes around the world have begun to map the skies around our planet, with the express goal of creating a new reference system for future space observations. Just like the GPS reports your position depending on latitude and longitude, so too the position o... |
19 November 2009
03:06 GMT |
|
|
Between Wednesday, November 18, and Thursday, November 19, more than 35 radio telescopes around the world will take part in the largest effort ever of creating a sky grid. This system of reference will allow astronomers to better detect the position of various celestial objects, relative to the position of the Earth.... |
17 November 2009
04:01 GMT |
|
|
Millions of people use the perks of the Global Positioning System (GPS) every day, but few of us take a moment to consider how this exceptional invention works. Most people know that it establishes the position of a GPS receiver, which may be installed in a car, for example, based on the time it takes for beams o... |
30 October 2009
07:07 GMT |
|
|
Astronomers have finally discovered proof that confirms a long-held belief, namely that the shock waves generated by supernova explosions act like giant and extremely powerful particle accelerators. They came to this conclusion when they recently discovered that cosmic-ray particles, generated only when a massive sta... |
26 June 2009
02:44 GMT |
|
|
Astrophysicists investigating the latest results provided by NASA's Chandra X-ray Observatory have discovered something truly amazing, and namely that a certain class of black holes has the ability to regulate its own growth, by simply shutting down or reducing the amount of high-speed particles they usually emi... |
26 March 2009
06:19 GMT |
|
|
The 3C 66A and 3C 66B distant galaxies seem to be harboring a very potent source of gamma-rays, an international team of scientists has recently announced, after a high-energy gamma-ray burst (GRB) was discovered by the MAGIC telescope in La Palma, the Canary Islands. The research team, which has involved several gro... |
6 March 2009
04:39 GMT |
|
|
Cosmic dust may be one of the most important barriers in our way to understanding the exact nature of the Universe, astronomers have recently said, following a new study by the Sloan Digital Sky Survey (SDSS-II). They have added that, regardless of an observer's position in the vastness of space, a direct view w... |
26 February 2009
10:17 GMT |
|
|
Astronomers managed to establish just recently that the Q0957+561 quasar, also called the twin quasar, doesn't owe its intermittent brightness to possible attractions from celestial bodies around. Instead, the unusual glow comes from the region itself, located approximately 9 billion light-years away from Earth,... |
30 January 2009
13:31 GMT |
|
|
As you probably already know, more than 95 percent of the matter in the universe is mostly invisible to the electromagnetic spectrum, meaning it is not emitting any form of light. However, just because an object is invisible, it does not necessarily mean it is not there. Astronomers searching for new distant galaxies... |
14 January 2008
03:00 GMT |
|
|
Even with the help of large space telescopes, we might never find the answers to some of the most intriguing mysteries of the universe. Though mankind has a number of space telescopes in the close orbit of the Earth, scientists want even more powerful tools to make detailed observations of the universe, to build bett... |
21 November 2007
09:06 GMT |
|
|
|
|
Find us on Google+
