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Home / News / Tags / dark matter
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Stories about: dark matter |
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Results of computer simulations carried out at the Nagoya University, Japan show that, in the outcome of the tremendously energetic event that gave rise to what we now call the universe, ripples propagating through matter caused clouds of gas to condense and collapse, so as to form the first objects to shine visible ... |
1 August 2008
03:49 GMT |
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The construction of the 12 observation lines of the first underwater neutrino telescope, Antares, is now complete and for more than a month now, two of the observation lines have been operational, continuously looking for any sign of neutrino particles coming from out of space. Antares is part of the European Antares... |
5 July 2008
04:12 GMT |
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One of the most expected launches of the year was carried out yesterday at approximately 12:05 pm EDT from NASA's Launch Complex 17-B at the Cape Canaveral Air Force Station, with the help of a Delta II rocket. The newest high-energy gamma-ray space observatory GLAST was launched into space and inserted into Ear... |
12 June 2008
03:43 GMT |
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Our galaxy contains about 1 trillion solar masses, says a recent estimation regarding the weight of the Milky Way. All previous estimates showed that the galaxy has a mass ranging between 750 billion to over 2 trillion times that of our Sun, the latter being slightly favored and probably closest to the true weight. H... |
28 May 2008
03:51 GMT |
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NASA's GLAST satellite, or the Gamma-ray Large Area Space Telescope, set to study the universe at its highest energies was scheduled for launch on June 3rd, between 11:45 a.m. and 1:40 p.m. EDT from the Launch Complex 17 at NASA's Cape Canaveral Air Force Station. GLAST will be carried into space with the h... |
26 May 2008
09:35 GMT |
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The Search for Extraterrestrial Intelligence, or SETI for short, has been surveying transmissions that would hopefully turn out be a sign from ET for the last couple of decades or so, although nobody seems to be calling. Now scientists believe that this may have something to do with the fact that we're only look... |
22 May 2008
04:38 GMT |
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From our understanding of the universe as we see it we can safely say that ordinary matter all things we know are made of can account for only 5 percent of the total mass of the universe. The rest of 95 percent is made of dark energy and dark matter, elusive forms of energy and matter that haven't been yet direc... |
6 May 2008
09:16 GMT |
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While observing galaxies in the early life of the universe, Yale University researchers discovered nine young galaxies presenting unusual high densities of stars. Although measuring only 5,000 light years in diameter, as opposed to the Milky Way which is more than 100,000 light years across, these galaxies contain am... |
29 April 2008
10:09 GMT |
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The attention of the world has recently been focused on the startling assertion made by the DAMA experiment researchers claiming that they have found evidence of WIMP particles existence, possible constituents of dark matter, while the Large Hadron Collider was somehow forgotten for a brief period of time. The most p... |
24 April 2008
04:41 GMT |
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Last week, physicists from the Dark Matter experiment running for the last five years under 1.4 kilometers of solid rock beneath the Gran Sasso mountain in Italy, presented their findings suggesting that dark matter particles had been discovered in the 250 kilograms sodium-iodide WIMP detector. Dark matter was first ... |
23 April 2008
04:40 GMT |
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NASA's gamma-ray telescope developed in order to explore the high-energy universe, such as astrophysical and cosmological phenomena occurring inside active galactic nuclei, pulsars, dark matter and so on, has been fitted recently with the Ku-band communication system. The Ku-band system will have the role of ens... |
22 April 2008
06:35 GMT |
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DAMA, or the Dark Matter collaboration, has just finished its four-year second phase of its experiments and claims to have strong evidence of observing dark matter particles. The same Italian and Chinese collaboration claimed to have had clear evidence of dark matter existence ever since 2003, although other physicis... |
17 April 2008
11:10 GMT |
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The discovery of what appears to be yet another case of cosmic cannibalism between a massive galaxy and a dwarf one, similar to that between the Milky Way and the Sagittarius dwarf galaxy satellite, confirms the prediction of the cold dark matter model of cosmology, stating that large spiral galaxies formed through m... |
16 April 2008
09:25 GMT |
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Dark matter is believed to be responsible for more than 70 percent of the total mass of the universe, however somehow we can't find any, even while regular matter represents only 4 percent of the total mass. This means only two things: either dark matter presents weak interactions towards ordinary matter or dark... |
7 April 2008
10:24 GMT |
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The technique, named by astronomers astro-comb, uses a detection method relying on measurements related to the radial velocity of the parent star, or wobble, by making observations on the wavelength shifts determined by the gravitational pull of the planet. By doing so, astronomers will be able to detect planets rela... |
3 April 2008
10:38 GMT |
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If it were visible from the Earth with the naked eye, it would appear as a structure eight times bigger than the apparent size of the Moon! Measuring more than 270 million light-years across, the newly discovered cloud is the largest structure of dark matter ever observed. The discovery was made by an astronomer from... |
17 March 2008
11:59 GMT |
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They are out there, we know what kind of destruction their capable of, however we have also been lucky enough not have such an object forming in the vicinity of our solar system. Or haven't we? Our biggest threat right now, however, doesn't come from black holes, death rays of any kind or other impending di... |
11 March 2008
07:02 GMT |
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A decade has passed since physicists postulated the existence of dark matter and dark energy in order to complement the missing matter in the universe; however, its constituents are still eluding detection. Aside the weakly interacting neutrino particles described in the Standard Model of the universe, scientists are... |
4 March 2008
02:44 GMT |
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We have yet to find direct evidence of dark energy existence, fact which is kind of annoying for most cosmologist. But do we really need it to explain the absence of more than a quarter of the matter in the universe? Well apparently not, according to a study published by the Carnegie Institution of Washington. Carbon... |
29 February 2008
03:29 GMT |
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The Department of Energy's Fermi National Accelerator Laboratory Cryogenic Dark Matter Search Experiment spokesperson, Blas Cabrera, from Stanford University, claims that their scientists are currently spearheading the search for the best candidates for dark matter. The CDMS experiment is located in a mine in So... |
27 February 2008
11:01 GMT |
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Measuring the mass of macroscopic objects is relatively easy, however when we're talking about elementary particles with masses lower than E-30 kilograms (one followed by 30 zeros!), the mass of the electron, things tend to get rather complicated. Usually, the mass of particles is calculated through mathematical... |
13 February 2008
09:25 GMT |
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It is largely speculated throughout the astrophysical community that the first stars might have been created out of dark matter, albeit while we mostly know nothing about dark matter and dark energy, what it is made of and its properties, now a theoretical physicist at the University of Michigan, Katherine Freese, pr... |
13 February 2008
02:53 GMT |
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Either it is exerting an extra gravitational pull on the galaxies or is driving the expansion of the universe, dark matter and dark energy remain mostly mysterious even today. Astrophysicists say that the matter distribution in the universe points towards a concentration of 4 percent of regular matter while the remna... |
1 February 2008
03:02 GMT |
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Is the expansion of the universe triggered by the repulsion force of dark matter or by the pulling action of a mysterious massive force originating in the outer boundaries of the universe? Such information is currently unavailable, but one thing is for certain: gravity is not enough to keep the galaxies and galaxy cl... |
31 January 2008
03:33 GMT |
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Dark matter is supposed to be all around us, nevertheless we have failed so far to make a direct observation of a dark matter cloud. The giant neutrino detector located in Antarctica, IceCube, will most likely receive an upgrade in order to produce direct evidence that dark matter can be found in the center of the Mi... |
17 January 2008
03:37 GMT |
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Electromagnetic observations of the visible universe represent the most important and powerful tool while studying large structures lying in the near vicinity of our galaxy, regardless of the wavelength domain used in the process - optical, radio or X-ray and infrared. The HI Nearby Galaxy Survey, or THINGS for short... |
16 January 2008
04:44 GMT |
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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 |
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What is the dark matter? I don't know; in fact, nobody knows for certain what it is. However, we do know two basic facts: we proved that it does exist, and without it the galaxies would mostly fall apart. Nevertheless, it is extremely hard to create a complete image of the past and future of the universe, when y... |
12 January 2008
07:14 GMT |
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It has been a very busy week for astronomers, as this year's American Astronomical Society meeting has taken place. New astronomical discoveries started pouring from all over the place, announcing observations of ultramassive black holes, new evidence of dark matter existence, the discovery of a new Einstein dou... |
11 January 2008
10:59 GMT |
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Einstein's Theory of Relativity revealed a series of strange spatial and temporal effects. The Einstein ring is only one of many. Recently, the famous Hubble Space Telescope was able to detect a double ring pattern, resembling a bull's eye-like optical effect, determined by the presence of a complex light b... |
11 January 2008
08:36 GMT |
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We know it's out there, but we can't see it because it doesn't emit light. So how do you find a dark matter cloud? Well, if you consider the fact that most of gravitational fields produced in the universe are associated with dark matter existence, then the problem is solved. Astrophysicist Catherine He... |
11 January 2008
05:55 GMT |
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Don't ask me when the end of the world will come, I can't tell you, but one thing is for certain: a black hole could possibly trigger one. Especially taking into consideration the fact that about 30 percent of the total black holes population in the universe is thought to wander alone through space. Add the... |
11 January 2008
04:56 GMT |
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ESA's gamma-ray space observatory, Integral, detected what seems to be a mysterious cloud of antimatter in the close vicinity of the Milky Way's central core, and its specific shape seems to point towards its origins, as previously there were no valid theories regarding the processes which could be held res... |
10 January 2008
05:42 GMT |
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Galaxies that formed only one billion years after the Big Bang reveal that the presence of dark matter is essential in constructing a new model of the universe. Computer simulations of the interaction between ordinary and dark matter expose violent but rather critical interactions, which are mostly being ignored in t... |
3 December 2007
04:50 GMT |
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Recent studies show they might have not. Powered with energy, resulted from the interaction between ordinary matter and dark matter, and having masses between 400 to 200,000 times that of the Sun, these so-called "dark stars" could have been the first structures to ever populate the universe.It is now widely believed... |
3 December 2007
04:03 GMT |
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The problem of dark energy and dark matter was first tackled by Albert Einstein, while working on The Theory of General Relativity. His calculations showed that the universe should present one of the two possible states: either expanding, or contracting. Unwilling to believe his own work, regardless of the results, h... |
30 November 2007
10:06 GMT |
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While working on the Theory of General Relativity, Einstein was trying to come up with an equation of the static universe, which required a cosmological constant to balance the effect of gravity so the matter in the universe would not collapse to a big crunch, but would rather remain in general configuration seen tod... |
28 November 2007
06:27 GMT |
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The current standard models postulate that quarks and leptons are the basic building blocks of all matter. However, in the 1970s, some scientists argued that quarks are not fundamental particles, but are themselves composed of other smaller particles called preons. Though the preon particles sparked a lot of excitem... |
22 November 2007
05:30 GMT |
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Last year, an Italian collaboration sparked the interest of physicists all around the world when they announced that they have observed the conversion of a photon particle, into a predicted axion particle, thus discovering the first particle outside the Standard Model and the first observation of dark matter. A team ... |
20 November 2007
10:40 GMT |
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This is a review of the top ten strangest things in space that scientists still study and try to formulate, theories that open our imagination to new horizons and new technological possibilities. 1. Antimatter - all the things we know and see are made out of matter and energy. For a long time it was thought that ato... |
8 November 2007
10:48 GMT |
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Or so two Canadian astronomers say. In august a group of astronomers from the University of Arizona at Tucson reported the collision of a cluster of galaxies situated 3 billion light-year away from Earth, known as the Bullet Cluster. Images from NASA's Chandra X-ray telescope, suggest that during the collision, ... |
30 October 2007
04:06 GMT |
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The dark matter is supposed to be one of the forms of energy present in our universe, besides ordinary matter, out of which everything we know is composed, and pure energy. It is called dark matter because it was not actually observed, but its effects can be seen in all the visible galaxies. According to observations... |
26 October 2007
08:45 GMT |
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