|
Home / News / Tags / white dwarf
|
|
30
Stories about: white dwarf |
|
|
Binary star systems are regular solar systems in all respects but one – they have two stars at their core, and not just one. The bodies revolve around each other, or around a common center of mass, depending on their configuration. One such system can be found in the Ophiuchus Constellation, where the pair is m... |
22 April 2009
06:08 GMT |
 |
|
Novae usually originate in binary star systems made of a white dwarf star and a red dwarf. Since the red dwarf is unable to hold its mass together, material is siphoned towards the surface of the white dwarf, where it accumulates until the star becomes unstable and initiates thermonuclear reactions in the outer mater... |
28 July 2008
10:27 GMT |
|
|
Yet another exploding star was discovered in the Milky Way galaxy by Europe's X-ray space observatory, XMM-Newton, during a slew survey. It should have been spotted several days before the actual discovery by the thousands of astronomers throughout the world. According to estimations, the event should have been ... |
19 July 2008
04:41 GMT |
|
|
SuWt 2 is a planetary nebula located in the Centaurus constellation about 6,500 light years away from Earth. It appears as a bright ring of gas with faint lobes perpendicular to the ring, thus giving it the rough look of an hourglass shape. The gas remnant is probably material ejected from a dead star which collapsed... |
4 June 2008
05:03 GMT |
|
|
Pulsars are a type of rapidly rotating neutron stars with powerful magnetic fields, capable of projecting a beam of electromagnetic radiation that sweeps the surrounding space as they rotate. They are usually found in the company of white dwarf stars, although the latest addition to the long list of pulsars seems to ... |
16 May 2008
03:34 GMT |
|
|
The newly found supernova remnant is the result of a stellar explosion that would have been seen from Earth some 140 years ago. The previous youngest supernova remnant found in the Milky Way was Cassiopeia A, resulted some 330 years ago. The current record holder, G1.9+0.3, represents to astronomers a missing link be... |
15 May 2008
02:54 GMT |
|
|
The Argonne Blue Gene/P supercomputer may be the most powerful in the world but it will still require 22 million computational hours in order to simulate a process that in real life only takes 5 seconds to unfold. Robert Fisher and Cal Jordan from the University of Chicago's Center for Astrophysical Thermonuclea... |
5 May 2008
04:29 GMT |
|
|
Most stars in the universe, including our Sun, end their lives as white dwarfs, highly dense objects burning the leftovers of the nuclear fuel of what used to be the core of the star during most of its life. These objects can be so dense that they can pack a mass of about 1.5 times that of the Sun into a volume compa... |
5 May 2008
02:57 GMT |
|
|
A comparison between supernova explosions taking place today and those that occurred early in the life of the universe reveals that the latter appear to age slower, as if time was warped somehow. It may look as counterintuitive or even impossible to some of us, but in fact, this is confirmed by the inflation theory, ... |
29 April 2008
02:51 GMT |
|
|
Previous stellar models showed very clearly that all stars must go through a supernova stage at the end of their lives; however, a new study reveals that supermassive stars may not be able to generate supernova explosions, but they would rather suffer a sudden gravitational collapse to turn into a black hole. But if ... |
7 April 2008
08:57 GMT |
|
|
White dwarfs are stars in their final stages of life. They are extremely brilliant, usually much smaller that the Sun - because they are basically the cores of dead stars - and cool down and reduce their brightness with the passing of time, until they turn into brown dwarfs, star so faint that they cannot be spotted ... |
26 March 2008
11:40 GMT |
|
|
With the help of light echoes, astronomers have been recently able to measure the brightness of a supernova explosion which took place about 400 years ago. The so-called SNR 0509-67.5 supernova remnant is located in the Large Magellanic Cloud, a galaxy in the near vicinity of our own Milky Way. While the original lig... |
20 March 2008
12:25 GMT |
|
|
Take a good look at the picture of this nebula, this is how our solar system will look like in about 5 billion years or so. NGC 2371's glowing bubble of gas surrounding a white dwarf is a planetary nebula probably resulted in the explosion of an average star, relatively similar to the Sun. All that is left of th... |
4 March 2008
10:45 GMT |
|
|
Supernova SN 2007on was discovered last year in the location of what previously was a binary system, composed of at least one white dwarf and another stellar companion, most likely a regular slightly more massive star or possibly a second white dwarf. It is now known that the supernova is a Type Ia, meaning it was de... |
14 February 2008
03:46 GMT |
|
|
Supernova explosions are generally triggered by a unbalance between the gravitational force produced by the star and the thermonuclear fusion reactions. Nonetheless, astronomers argue that such explosions could be determined through more stronger interactions, like those between a white dwarf and a medium size black ... |
30 January 2008
04:49 GMT |
|
|
It is generally believed that supernovae usually spread dust into interstellar space as they explode. However, astrophysicists have recently found that this is not always the case, and some might actually collect dust after a supernova phase. These are usually small stars that explode periodically, while gathering cl... |
28 January 2008
09:21 GMT |
|
|
Imagine staying younger and fit for a longer time just by eating, instead of getting older and fat... if only this process would be available for all of us. Last week took place the annual American Astronomical Society meeting in Austin, Texas, where astronomers presented the results of some of the latest studies con... |
18 January 2008
08:54 GMT |
|
|
What seems to be a single object in the image provided by the Gemini Observatory is actually a structure formed by two separate different supernova explosions, which could have taken place about a few thousands years ago. The object located in the Large Magellanic Cloud was discovered in the early 1970 and classified... |
11 January 2008
09:25 GMT |
|
|
White dwarfs are believed to be the remnant of a stellar core, after a supernova explosion, which would slowly cool and evaporate as time goes by, but this theory might be soon scrapped as observations made with the Suzaku X-ray space telescope reveals a new type of white dwarf presenting some strange features that h... |
3 January 2008
06:44 GMT |
|
|
The massive explosion of the Supernova 2006gz was at first thought to have been the death of a star, as it usually occurs, but high contents of heavy elements seem to shatter this idea. Located in a spiral galaxy named IC 1277, about 300 million light years away in the Hercules constellation, SN 2006gz shows strong e... |
2 November 2007
04:19 GMT |
|
|
|
|
