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Home / News / Tags / magnetic field
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Stories about: magnetic field |
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Auroras are, arguably, some of the most beautiful manifestations that can be seen on the night sky, if you live at high latitudes, near the Arctic and Antarctic Circles. Caused by high-energy particles slamming into the planet's magnetosphere, these phenomena originate on the surface of the Sun, where emissions ... |
20 July 2009
02:51 GMT |
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Speaking on April 23rd at the general assembly of the European Geosciences Union in Vienna, Austria, University of California in Berkeley (UCB) Space Sciences Laboratory Space Physicist Andreas Keiling presented a few of the readings NASA's THEMIS satellite suite recorded when analyzing the formation of the ligh... |
24 April 2009
03:33 GMT |
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Researchers at the Paris Observatory in France have managed to discover faint magnetic fields around young stars, which seem to originate back in the time of the Big Bang, they say. The stars are yet too young to have formed a field of their own, and the team is convinced they have come across a strong evidence of th... |
27 January 2009
08:21 GMT |
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Based on the historic accounts of the devastation the large 1859 solar storm did in its time, the National Academy of Sciences (NAS) released a new report recently that makes us draw terrifying conclusions about the aftermath of a potential solar storm hitting the Earth and passing through the magnetic defenses our p... |
8 January 2009
12:01 GMT |
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A new study supported by NASA and the National Science Foundation has reached more thorough results related to the way solar storms affect the Earth's magnetic shields, making the old views inaccurate. Depending on the alignment with the Sun's magnetic field, our own develops two huge holes which allow larg... |
17 December 2008
16:31 GMT |
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A new research performed by a team of specialists led by Charles Chappell, research professor of physics and director of the Dyer Observatory at Vanderbilt University, collected and analyzed the data resulted from the observations of five different satellites. The data were related to the composition and behavior of ... |
13 December 2008
19:01 GMT |
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We actually don’t know that many things about stars, despite the fact that there have been many attempts and numerous researches in the field. The only close star we have most access to, theoretically speaking, is the Sun. But we only know little about it as well, given the still limited technology we have, and... |
13 December 2008
07:35 GMT |
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When people hear about mass extinctions of the past, they immediately think dinosaurs and asteroids, but what they don't know is that the event that occurred about 65 million years ago (at the end of the Cretaceous Period), was not the first. In fact, before they even appeared, life came close to being obliterat... |
13 December 2008
04:16 GMT |
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There's not much certainty provided by the facts theorized about the Earth's early years. Actually, the first five hundred millennia hold so little record of activity that the respective time frame is referred to as the Earth's dark ages. This major shortage of solid proof left many questions unanswere... |
9 December 2008
06:13 GMT |
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At long last, after decades of assiduous efforts, scientists were able to come up with a sound model for the movement of the atoms within a magnetic field, which could prove to be a key element in developing enhanced, less claustrophobic MRI devices. The finding, which could provide improved control of magnetic reson... |
2 December 2008
16:11 GMT |
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The memorable event that takes place on the Earth's poles, called aurora, is not only restricted to our planet. The Sun and the magnetic fields of other planets allow for it to occur in the different atmospheres of the latter as well, although it may look nothing like what we're accustomed to. In fact, they... |
24 November 2008
07:40 GMT |
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As some of you may know, the idea of ancient asteroids smashing off on the Martian surface and shutting down most of the planet's magnetic field is not new, and we've already written about it in a previous article. But a recent study provides more insight on how this may have happened, aided by new data obt... |
21 November 2008
03:58 GMT |
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According to NASA scientists, every 8 minutes – about the time it takes one to read this article – there's a peculiar and still unexplained event going on way overhead. The magnetosphere – the protective magnetic bubble that envelops the planet, Earth's equivalent of the heliosphere &ndash... |
3 November 2008
07:46 GMT |
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The analytical technique of mass spectrometry allows the identification of the chemical composition of a sample or of a compound based on the mass-to-charge ratio of its charged particles (ions). This ratio of the particles is observed via passing them through the electric and magnetic fields of a mass spectrom... |
31 October 2008
09:33 GMT |
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A recent study sheds new light on the early years of the solar system, and comes to indicate that its whole evolution must be reconsidered. According to the findings, during the first 3 million years, the system was full of miniature planets, called planetesimals, that sported tiny molten cores and solid crusts, and ... |
31 October 2008
05:31 GMT |
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The third sunspot in 3 weeks has just been discovered on the Sun's surface, which possibly means that its long dry period has finally come to an end. As you may know from our previous articles, the star of our solar system has been going through a rough time, with both its winds and sunspots at a record lo... |
14 October 2008
10:33 GMT |
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The fatidic date of December 21, 2012 was linked by many to the drastic decrease in strength of our planet's magnetic field and to the complete reversal of its poles. This would leave Earth undefended against solar radiation, as well as force our satellites down from their orbit, wrecking the GPS system, further... |
6 October 2008
04:15 GMT |
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Following the recent discovery of the Sun being at a record low in wind, another surprise came from its observers when they claimed that more than 200 days had passed without a spot on our star. It's been more than half a century since this last happened. The previous record was registered in 1954, when th... |
4 October 2008
05:45 GMT |
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As researchers finally conducted their first direct measurement of a young, far galaxy's magnetic field, the result shocked them, since it was found to be ten times stronger than the Milky Way's, exactly the opposite of what they had originally predicted.The 6.5 billion light years away young galaxy DLA-3C2... |
2 October 2008
08:53 GMT |
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Recent researches in our planet's lava flows seem to indicate that the North Pole is becoming weaker and weaker, as the magnetic field Earth generates is decreasing in intensity. According to the September 26 issue of the journal “Science,” secondary magnetic sources, other than the constant, turbule... |
29 September 2008
05:54 GMT |
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Although the name dynamo was originally associated with all types of electrical generators, currently it is only used to describe mechanisms capable of producing direct current and small devices used to generate the power running the lights of bicycles (see featured image). A dynamo is basically a device able to conv... |
1 August 2008
08:49 GMT |
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The dynamics of explosive magnetic substorms, responsible for generating the aurora borealis and for the interferences affecting both satellites in Earth's orbit and electric and electronic devices on the surface, have now been revealed by NASA's five THEMIS spacecrafts, solving a mystery that has been a ce... |
25 July 2008
02:34 GMT |
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Humans have been fascinated for centuries by the capability of migratory animals to navigate the globe, sometimes even returning to exactly the same spot from which they left, after retracing more than 15,000 kilometers. The markers that guide them in their voyage are a mystery even today, although most researchers b... |
23 July 2008
10:52 GMT |
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The general belief amongst astrophysicists is that the magnetic field of a galaxy evolves simultaneously with the galaxy, slowly building up in time. New observations of the distant universe on the other hand, appear to suggest that this is not quite true and that young galaxies also possess powerful magnetic fields ... |
17 July 2008
02:51 GMT |
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An important step towards the creation of the first commercial nuclear fusion reactor has been taken last week as the South Korean authorities revealed that the KSTAR reactor, short for Korea Superconducting Tokamak Advanced Reactor, conducted its first experiment by producing a sustained field of super-hot plasma. T... |
15 July 2008
07:04 GMT |
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Gamma-ray bursts are the brightest and most powerful type of electromagnetic radiation that can be emitted in the universe in the outcome of a violent stellar explosion, whose afterglow remains extremely bright up to several hours after the occurrence of the event that generated it. A new study found that afterglows ... |
9 July 2008
03:42 GMT |
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Mercury is the smallest planet in the solar system, but one thing is certain: it wasn't always this small. At least, that's what the data collected by NASA's MESSENGER spacecraft during the beginning of this year reveals. In the early history of the solar system, when Mercury was much warmer than it is... |
5 July 2008
04:56 GMT |
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It is widely known that the Earth's magnetic field is varying in strength periodically and has reversed poles several hundred times in the past 4.6 billion years, since our planet exists. However, new measurements show that the changes take place much more rapidly than is has been previously predicted, especiall... |
1 July 2008
06:09 GMT |
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Relays are a type of electrical switches that are controlled through an electrical circuit, separate from that of the actual switch. Typical relays are mostly operated through an electromagnet exerting a magnetic field on a mechanical actuator. Nevertheless, advancements in the semiconductor industry during the last ... |
14 June 2008
06:14 GMT |
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Measuring small variations in weak magnetic fields can prove rather difficult at times, especially when other stronger magnetic fields are present. Take for example the magnetic sensors used in the automotive industry. They are used to measure a whole range of parameters, including temperature variations, minute air ... |
9 June 2008
06:50 GMT |
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It was first discovered in 1911 during experiments with mercury cooled at temperatures close to absolute zero and nearly a century later, superconductivity still manages to baffle the minds of researchers. Scientists from the National High Magnetic Field Laboratory at Florida State University recently discovered a ne... |
2 June 2008
04:41 GMT |
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An electromagnet is a device used to generate a magnetic field with the help of an electric current. The principle that electromagnets work by is used in a wide range of electric and electronic devices such as electric motors, solenoids, tape drives and even speakers and microphones. The simplest electromagnet you ca... |
24 May 2008
07:00 GMT |
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The star was in fact known for a long time to be a magnetar, albeit SRON Netherlands Institute for Space Research astronomers have only recently discovered that it emits a strange high energy X-ray beam, sweeping across the surrounding medium as the star revolves around its axis. "I was looking for new sources of hig... |
22 May 2008
11:05 GMT |
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On April 25, a red dwarf star in the EV Lacertae constellation, known as Lacerta, ejected a massive solar flare equivalent to about a thousand solar flares emitted by the Sun. It was the brightest burst of light created by a normal star ever seen in the universe. The emission was first detected by NASA's Wind sa... |
20 May 2008
02:42 GMT |
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Magnetite is a naturally occurring compound on Earth and some quantities can even be produced by bacteria on our planet. Considering that magnetism can be detected relatively easy with the help of instruments produced with the current technology, a future mission to the Red Planet could find and return magnetite mine... |
9 May 2008
04:59 GMT |
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Mercury is the smallest, most mysterious and closest planet to the Sun. In fact this so called 'mystery' is associated to Mercury also being the least studied planet in the solar system, which may seem kind of strange given the fact that it is relatively close to Earth as compared to the other planets beyon... |
8 May 2008
02:50 GMT |
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Brushless DC electric motors are a design variation derived from the old brushed electric motors except that the relative motion of the rotor and the stator is reversed. To understand how this is done, one must first understand the basic construction and operation of a brushed DC electric motor. Typical DC motors imp... |
5 May 2008
09:11 GMT |
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Electromagnetic coils, most commonly known as inductors, are amongst the simplest electric and electronic components. They basically consist of a simple metal electrically insulated wire looped into a cylindrical, toroidal or even disk-like shape, with the role of providing inductance in an electric circuit. Inductan... |
30 April 2008
06:41 GMT |
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After a mission of twelve years to study the Aurora Borealis phenomenon the Polar satellite has now produced its final image, "The Broken Heart", as NASA researchers named it, a visible-light photograph of the lights generated during the interactions between solar wind, Earth's magnetic field and the upper atmos... |
29 April 2008
07:58 GMT |
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Aurora Borealis, most commonly known as the Northern Lights, is created when cosmic rays - solar wind in special - interact with the Earth's magnetic field and the atmosphere in order to determine light emissions in the gas atoms located in the upper layers of the atmosphere. In the middle of the 20th century, R... |
26 April 2008
01:48 GMT |
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Once it was thought that the quantum Hall effect is experienced in materials under the influence of external magnetic fields, albeit Princeton University researchers revealed that it may also be experienced in bulk bismuth-antimony crystal without any interference from magnetic fields. The discovery could possibly le... |
25 April 2008
10:40 GMT |
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Supermassive black holes are mostly found in galactic nuclei, ejecting matter in the form of particle jets at relativistic speeds during the 'feeding' process. According to theory, these particle jets are accelerated to these speeds by tightly-twisted magnetic fields generated in the close proximity of the ... |
24 April 2008
02:58 GMT |
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Earth's powerful magnetic field is shaped by the solar wind into a tear-like elongated structure, enveloping the planet. This so called magnetotail spans well beyond the orbit of the Moon, meaning that the Moon passes through it once a month, during the full moon phase, determining lunar dust storms and electros... |
18 April 2008
08:33 GMT |
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The solar wind originates from the Sun of course, everybody knows that, but not many can explain how solar wind is actually generated, at least not in an accurate manner. Yesterday, a team of researchers from the University College London's Mullard Space Science Laboratory, led by professor Loise Harra, presente... |
3 April 2008
06:28 GMT |
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It is well known that the atmosphere of the Sun is extremely dynamic, violent and excessively hot, ejecting massive quantities of matter into the surrounding space, basically every minute. But what drives and, more important, how these processes are driven remain mostly a mystery. Current and past observations with J... |
3 April 2008
05:56 GMT |
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Most of us will probably never understand the true power of the Sun. Three thousand degrees Celsius or three million degrees do not make any difference to the average person, because one could never experience temperatures of this magnitude. And even if s/he experienced, s/he would never share his experience with any... |
3 April 2008
05:10 GMT |
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Jupiter and Earth, two extremely different planets. One has a solid surface, the other has no surface at all; one is a rocky planet, the other, a massive gas giant, and so on. However, this doesn't mean that the two are totally different from one another. It looks like Jupiter and the Earth share one key feature... |
10 March 2008
05:30 GMT |
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Have you ever noticed how both Mars and Venus are ranked as planets rather similar to Earth, but never to each other? The ESA believes it's about time it put an end to this situation and gave the task to both the Mars Express and the Venus Express, to conduct simultaneous probing investigations to establish whet... |
5 March 2008
10:32 GMT |
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What better evidence for the coming of spring than the appearance of the aurora borealis, or most commonly known as the northern lights? Well, at least astrologically speaking, in the context of ever wobbling clime. For some unknown reason, it seems that the aurora borealis phenomenon takes place only during the spri... |
5 March 2008
03:45 GMT |
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Following the steps of their fellow colleagues form the European Space Agency, NASA also has in plan to implement a program to predict the space weather determined by the activity of the closest star to Earth - the Sun. Lying just over 150 million kilometer from Earth, the Sun, with a diameter about 100 times that of... |
4 March 2008
07:04 GMT |
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