|
Home > News > Tags > gamma-rays
|
|
30
Stories about: gamma-rays |
|
|
More: next 50 >>
Though astronomers know that as much as one fifth of all stars in the Milky Way may exist in binary systems, they are still having a hard time finding the more obscure pairs. In a recent study, a fortuitous discovery may have just highlighted a new method of searching for such hidden stellar pairs.
A binary is a sy... |
13 January 2012
05:57 GMT |
 |
|
Experts operating the NASA Fermi Gamma-ray Space Telescope have just released the first census of energy sources exceeding 10 billion electron volts (GeV). This is the first full survey of such extreme sources ever developed.
The reason why this is such an accomplishment is that gamma-rays at such high energies can... |
11 January 2012
09:28 GMT |
|
|
Astronomers using the NASA Fermi Gamma-ray Space Telescope say that the remnants of the cosmic object known as Tycho's supernova have recently been imaged in high-energy gamma-rays. They say that the structure is extremely active in this region of the electromagnetic spectrum.
The supernova first appeared as an... |
13 December 2011
10:38 GMT |
|
|
According to the conclusions of a new scientific investigation conducted using the NASA Fermi Gamma-ray Space Telescope, it would appear that stellar nurseries are one of the primary sources of cosmic rays in the Universe.
These radiations are comped mainly of protons, but also other types of subatomic particles. T... |
29 November 2011
02:54 GMT |
|
|
In a paper published in the November 3 issue of the top journal Science, an international collaboration of astronomers announces that the NASA Fermi Gamma-ray Space Telescope was recently able to accomplish a number of milestone. They were all reached during its latest survey.
One of the most important discoveries ... |
4 November 2011
04:36 GMT |
|
|
Researchers at the NASA Goddard Space Flight Center (GSFC), in Greenbelt, Maryland, led by heliophysicist Doug Rowland, are now getting ready to send a device called the Firestation to Earth's upper atmosphere. The instrument will study various phenomena related to lightning. According to the research team, the ... |
18 October 2011
05:29 GMT |
|
|
Cosmic collisions and explosions taking place as far away as the other side of the galaxy could pose a significant risk to life here on Earth. This class of events has the potential to trigger the release of unfathomably-large amounts of radiations, which the magnetosphere will not be able to deflect.
Usually, our... |
8 October 2011
14:01 GMT |
|
|
Astronomers have known about the Crab pulsar and the nebula around it since 1054 CE, when the precursor star to this object blew up. Even now, nearly 1,000 years later, astronomers don't fully understand this object, and recently they found it to be more energetic than it should have been.
Observations of the... |
7 October 2011
03:02 GMT |
|
|
Scientists with the University of New Hampshire (UNH) began a new scientific investigation on Sunday, September 18, when they sought to launch a science balloon up into Earth's stratosphere. The launch was to take place from a NASA launch facility in Fort Summer, New Mexico.
The science balloon is capable of... |
23 September 2011
06:40 GMT |
|
|
A collaboration of researchers from the University of Warsaw (FUW) Faculty of Physics and the University of Naples Federico II announce the development of a new method for measuring cosmic distances. They say their approach uses the properties of gamma-ray bursts for this purpose.
In addition to the obvious use in... |
20 September 2011
03:42 GMT |
|
|
On September 9, participants at the American Astronomical Society's High Energy Astrophysics Division meeting in Newport, Rhodes Island, were treated to the conclusions of the newest, yearly report of cosmic gamma-ray sources compiled by the NASA Fermi Gamma-ray Space Telescope.The instrument, which is capable o... |
10 September 2011
06:45 GMT |
|
|
In late March, astronomers began observing a new source of X-rays in the night sky. After monitoring the event for a while, they were able to conclude that they were witnessing the reawakening of a black hole. The process takes place as the massive object is consuming a nearby star.When the first signs of the event w... |
25 August 2011
04:20 GMT |
|
|
Some time ago, a group of researchers proposed that we may be living in a three-dimensional projection of a bi-dimensional space. The hologram Universe theory rallied a number of adepts, but a new research is proving that some of its most basic tenants are flawed.Astrophysicist Craig Hogan first proposed that the Uni... |
6 July 2011
08:49 GMT |
|
|
Astrophysicists are mesmerized about a particular binary star system in the southern constellation Crux. Made up of a massive star and a pulsar, the system exhibits some weird and unanticipated behavior, as evidenced in a new study analyzing the two objects' close encounter.Within the system, the two objects bru... |
30 June 2011
05:09 GMT |
|
|
Despite studying the Universe for the better part of three years, the NASA Fermi Space Telescope has yet to discover tell-tale signs confirming the existence of dark matter. These signs should theoretically exist at certain gamma-ray wavelengths, but the observatory found no evidence of their existence. The reason wh... |
22 June 2011
07:50 GMT |
|
|
While analyzing the skies in the direction of the constellation Draco, the Swift Gamma Burst Mission spacecraft discovered a massive gamma-ray flash taking place on March 28. Experts now say that the event was most likely caused by a massive star falling into a black hole. Since the emission was first detected, astro... |
17 June 2011
03:46 GMT |
|
|
A few years ago, atmospheric scientists discovered an peculiar phenomenon taking place as lightning strikes were headed to Earth – the generation of a flash of radiation accompanying the event. Now, the cause of these flashes is beginning to be revealed.Called gamma-ray flashes (GRF), these phenomena are charac... |
13 May 2011
03:33 GMT |
|
|
About a month ago, the Crab Nebula flared up, and released a massive flare that was easily detected by telescopes monitoring the night sky. At this point, astronomers have no idea as to what may have caused the peculiar event, but theories are beginning to spring up.In the past, experts have seen the massive supernov... |
12 May 2011
02:58 GMT |
|
|
Astronomers were recently able to use the NASA Fermi Gamma-Ray Space Telescope to take a look at the nearby galaxy Centaurus A, and what they saw puzzled them. The cosmic structure releases ten times more radiation in gamma-ray wavelengths than it does in radio wavelengths.
This is peculiar because the galaxy is i... |
4 May 2011
07:06 GMT |
|
|
Astronomers using a NASA telescope managed to identify a pair of gamma-ray bubbles being produced at the center of our galaxy, the Milky Way. Early analyses of the latest data seem to indicate that the structures are being produced by the supermassive black hole that occupies the galactic core. The twin structures we... |
20 April 2011
05:31 GMT |
|
|
Experts at the American space agency have just produced the most detailed account of how short gamma-ray bursts (GRB) are formed from the collision of two neutron stars. The work will certainly become a reference point in this field, which deals with explaining the most energetic events in the Universe. The origins o... |
8 April 2011
11:08 GMT |
|
|
Last week, astronomers observed a massive, extremely energetic explosion in space. They now say that it may have been produced just as a massive star was destroyed by a black hole, which will now grow even more because it will have more “feeding” material at its disposal.Experts are still surprised by the... |
8 April 2011
03:59 GMT |
|
|
In a new study of an old gamma-ray burst (GRB), astronomers determined that the cosmic event struck our planet with the energy equivalent of more than half a million years of continuous sunlight. The event was so tremendously powerful that it caught us completely off-guard. Satellites in low-Earth orbit (LEO) and in... |
14 February 2011
09:42 GMT |
|
|
A group of astrophysicists has just proposed a new mechanism for the formation of some gamma-ray bursts (GRB), which are among the most energetic phenomena in the entire Universe. The experts say that the reason some GRB last for a long time is because black holes are eating the stars emitting them.GRB are extraordin... |
26 January 2011
05:24 GMT |
|
|
According to the results of a recent scientific investigation conducted using the NASA Fermi Gamma-ray Space Telescope, it would appear that powerful thunderstorms taking place in Earth's atmosphere can trigger the formation of antimatter beams above the clouds. This type of phenomenon has never been seen before... |
11 January 2011
03:30 GMT |
|
|
For many years, astronomers have considered the Crab Nebula to be one of the steadiest light sources on the sky, so much so that it was used to calibrate various instruments for in-depth studies of the Universe. Now, studies reveal three flare-ups in the nebula, challenging established knowledge.
The space object... |
7 January 2011
02:50 GMT |
|
|
For the past few years, rumor had it that the red giant Betelgeuse, one of the largest known stars in the Universe, is about go supernova and implode, potentially forming a neutron star or a black hole. A new investigation shows that this won't happen any time soon.However, the concerns that the international as... |
27 December 2010
04:02 GMT |
|
|
In a groundbreaking new finding, researchers have determined that our galaxy is spewing out two massive bubbles of high-energy radiations, which could very well be the result of eruptions coming from the supermassive black hole at the core of the Milky Way. The bubbles have been determined to originate in the center ... |
10 November 2010
04:48 GMT |
|
|
Astrophysicists show in a new study that two of the “darkest” things in the Universe may in fact be combining to produce highly-energetic radiation. The finding may open the way for developing new techniques aimed at observing dark matter. The team behind the investigation says that supermassive black hol... |
28 August 2010
05:47 GMT |
|
|
Recently, the Japan Aerospace Exploration Agency (JAXA) announced that its prototype spacecraft, the Ikaros solar sail, managed to harness the energy of photons in order to move through space. This is the first time a working machine of this nature has been devised, and the eyes of the entire worlds turned to the inn... |
23 July 2010
03:30 GMT |
|
|
Scientists at the US Department of Energy's (DOE) Lawrence Berkeley National Laboratory (Berkeley Lab) have been conducting research related to the fields of nuclear physics for many years. A couple of years ago, in 2008, experts at the Lab's Nuclear Science Division (NSD) launched the Applied Nuclear Physi... |
3 June 2010
04:57 GMT |
|
|
In orbit only since June 2008, the Fermi Gamma-ray Space Telescope has already produced some remarkable science. One of the most remarkable findings it made so far was the fact that the closest active galaxy to the Milky Way, called Centaurus A, is capable of emitting both gamma-rays and radio radiation. In previous ... |
2 April 2010
04:56 GMT |
|
|
Over the past few years, experts working in studying the mysteries of the Universe have determined that highly-energetic gamma-rays are produced by active galactic nuclei (AGN). This knowledge was based on scientific observations of the sky, using advanced telescopes and techniques. However, it would now seem that th... |
3 March 2010
02:43 GMT |
|
|
Scientists operating the largest optical wavelength observatory in the world, the Gran Telescopio CANARIAS (GTC), announce the discovery of the sixth-known magnetar. These weird cosmic objects are a special breed of neutron stars, which have incredibly strong magnetic fields emanating from their poles. Observing such... |
1 March 2010
09:08 GMT |
|
|
Astronomers operating the NASA Fermi Gamma-Ray Space Telescope have recently announced that they will turn the observatory towards our planet, in a bid to study the peculiar and mysterious events that terrestrial gamma-ray flashes (TGF) are. These events occur during very powerful storms, but thus far experts have ha... |
20 February 2010
03:10 GMT |
|
|
Black holes are undoubtedly some of the most mysterious forms of matter in the entire known Universe. Studying them is tremendously difficult, primarily because they do not reflect back any type of radiation in the electromagnetic spectrum. Moreover, they also absorb light, as well as any other form of matter that is... |
18 February 2010
10:06 GMT |
|
|
Cosmic rays are streams of protons that occasionally slam into the planet's atmosphere at speeds close to that of light. While their effects have been identified and studied extensively, astrophysicists have had a hard time figuring out where they originate. A leading explanation is that supernovae somehow produ... |
16 February 2010
03:32 GMT |
|
|
Many people know that gamma-ray bursts (GRB) are the most intense and energetic explosions in the entire Universe, when amazing quantities of radiation are emitted and accelerated at nearly the speed of light. The Earth's atmosphere protects us from these cosmic events to some extent, but not many people know th... |
12 February 2010
14:01 GMT |
|
|
In a recent discovery, experts have found a distant stellar explosion that did not behave in the manner expected from such a cosmic event. Namely, the supernova had some of the traits similar to a powerful gamma-ray burst (GRB), but was not exactly either of the two phenomena. Astrophysicists believe that future stud... |
28 January 2010
03:44 GMT |
|
|
Being the massive galaxy that it is, the Milky Way contains a little bit of everything. This includes highly explosive white dwarf stars that explode periodically at relatively stable intervals. Such a celestial body, which is long overdue for its next powerful eruption, lies closer to our planet than astronomers fir... |
5 January 2010
01:50 GMT |
|
|
There are very few massive stars in the Universe, proportionately compared with the number of smaller ones. The former live short, troubled lives, burning up their fuel very fast – within several millions of years. When they reach the end of their burning cycle, they explode in huge blasts that are so intense, ... |
10 December 2009
18:01 GMT |
|
|
Blazars, also called blazing quasi-stellar objects, are very compact quasars that are usually believed to exist in association with supermassive black holes. The structures can only be found in the active nuclei of giant elliptical galaxies, and are widely regarded as one of the most brutal and impressive phenomena i... |
10 December 2009
07:00 GMT |
|
|
Scientists at the American space agency are currently getting ready to perform a new series of radiation tests on a group of squirrel monkeys. The study will attempt to determine the possible effects that prolonged radiation exposure may have on astronauts during long-duration spaceflight to other planets, such as to... |
12 November 2009
19:01 GMT |
|
|
The Fermi Gamma-ray Space Telescope is one of the American space agency's best observatories, especially suited to discovering gamma-ray bursts coming towards our planet from the distant Universe. However, in its first 14 months of operations, the machine was able to record some peculiar signals coming in from t... |
9 November 2009
04:43 GMT |
|
|
NASA's Swift satellite is the first spacecraft to have spotted the first signs from the earliest known explosion in the entire Universe. The phenomenon is believed to have taken place about 13 billion years ago, when the Cosmos was just around 700 million years old. The star that exploded sent forth a massive am... |
29 October 2009
02:57 GMT |
|
|
When it comes to explaining the world around us, there are two ways you can go about it. You can either explain how large bodies interact, as in everything from apples and humans to planets and galaxies, or determine the behavior of extremely small, elementary particles, such as photons and electrons. General relativ... |
29 October 2009
02:42 GMT |
|
|
Examining the properties of black holes is not precisely the easiest thing in the world to do. In fact, one may argue that it's pretty difficult, considering that there is no way of probing them directly. They would engulf any spacecraft we send in their vicinity, and they also bend and swallow light, which mean... |
20 October 2009
03:56 GMT |
|
|
Gamma-ray Bursts (GRB) are arguably among the deadliest phenomena that can take place in the Universe. Believed to be generated in the dying throes of massive stars, these emissions exit the stars as jets of plasma, which then proceed to traveling billions of light-years in all directions. The high-energy particles t... |
19 September 2009
03:54 GMT |
|
|
A team of international researchers, working in collaboration with experts from the Naval Research Laboratory (NRL) Space Science Division have recently announced that the Fermi telescope managed to identify 16 new, bright sources of gamma-rays, in 16 pulsating neutron stars. For the discovery, blind frequency search... |
10 September 2009
10:41 GMT |
|
|
For a few decades, those believing that the chances for life elsewhere in the Universe are small have made circulate a theory that backs up their claims, known as the anthropic argument. Essentially, it states that the period of time it takes life to evolve is longer than the period in a star's life when it can ... |
13 August 2009
21:01 GMT |
|
More: next 50 >> |
|
|
Find us on Google+
