Latest Star types Stories

Highly Magnetized Pulsar At Galactic Center
2013-08-14 12:20:25

John P. Millis, PhD for redOrbit.com - Your Universe Online At the center of the Milky Way lurks a supermassive black hole known as Sagittarius A*, with some four million times the mass of our Sun. More than any single object, it has the greatest impact on the formation, evolution and fate of our galaxy. However, probing this massive object is difficult. Due to the nature of black holes, most of what we learn about their existence is derived by observing their influence on other nearby...

Heavy Metal Stars
2013-08-01 14:00:20

Lee Rannals for redOrbit.com - Your Universe Online Astronomers from the Armagh Observatory in Northern Ireland say they have discovered two unusual, heavy metal stars. The team wrote in the journal Monthly Notices of the Royal Astronomical Society that they found the stars HE 2359-2844 and HE 1256-2738 to contain extremely high concentrations of lead in their atmospheres. Naslim Neelamkodan, Simon Jeffery, Natalie Behara and Alan Hibbert said these two stars have surfaces containing...

The Largest Magnetic Fields In The Universe
2013-07-29 04:11:34

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online Gamma-ray bursts (GRBs) are thought to be the most powerful, energetic events in the Universe. They can release as much energy in one second as an entire galaxy expels in an entire year. But while astronomers have some solid theories on what drives these events, many of the details are still widely debated. One of the complicating matters comes from the fact GRBs appear to fall into two separate classes: long and short burst...

I Love Q Formula Insights Into Universe
2013-07-26 11:51:21

April Flowers for redOrbit.com - Your Universe Online Without understanding the internal structure in detail, it is still possible for scientists to learn a tremendous amount about neutron stars and quark stars, according to a new study from researchers at Montana State University. "The stars could be the softest or the hardest in their kind, and it wouldn't matter," said Nico Yunes, assistant professor in MSU's Department of Physics. Yunes and his colleague, postdoctoral scholar Kent...

Monstrous Stellar Collisions Not Expected To Occur Anytime Soon
2013-07-11 14:32:31

Lee Rannals for redOrbit.com - Your Universe Online Astrophysicists from the Astronomical Observatory of the Faculty of Physics at the University of Warsaw say the next collision of monstrous stars will not occur until billions of years from now. Three years ago, scientists discovered that the Magellanic Clouds host gigantic stars with between 200 and 300 times the solar mass  of our own Sun. Before then, astronomers believed that the biggest stars in the Universe did not...

Bursts Of Cosmic Radio Waves May Be From The Beginning Of The Universe
2013-07-05 05:13:51

[ Watch the Video: A Population of Fast Radio Bursts at Cosmological Distances ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers writing in the journal Science say they recently discovered mysterious bursts of radio waves originating from billions of light-years away. The scientists have already ruled out the possibility the bursts came from terrestrial sources. Based on the brightness and distance of the four radio waves, the researchers conclude they come from a...

Astronomers May Have Witnessed A Collapsing Neutron Star
2013-07-05 04:16:37

John P. Millis, PhD for redOrbit.com - Your Universe Online Radio observatories have recently noticed bursts of radio light emerging in the night sky. The intense flashes exist for only a moment then disappear and do not seem to repeat. These so called 'blitzars' are a mystery, but researchers Heino Falcke (Max-Plank Institute for radio astronomy) and Luciano Rezzolla (Albert-Einstein Institute in Potsdam) have suggested we may be witnessing the death-cry of a supermassive pulsar...

Red Dwarf Stars May Destroy Possibility Of Life In Their Systems
2013-07-01 18:43:05

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online Most of the stars in the Universe are classified as red dwarf stars - stars considerably smaller and cooler than our Sun. About 75 percent of the main sequence stars in our galaxy are classified as such, so they represent an exciting population to study in the search for life beyond Earth. If it were found that Earth-like planets formed around red dwarf stars, then the door would be opened to the possibility we might soon...

Stellar Collision Survivor New Type Pulsating Star
2013-06-28 14:54:18

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have discovered that the brightness of the remnant of a stellar collision can vary in a way that scientists have not observed before. The team wrote in the journal Nature that these observations will allow astronomers to learn what happens when stars collide in binary systems. Stars like our Sun expand to become red giant stars when the hydrogen that fuels the nuclear fusion in their cores runs out. Binary stars will...

Latest Star types Reference Libraries

2004-10-19 04:45:44

X-Ray Astronomy -- Although the more energetic X-rays (E > 30 keV) can penetrate the air at least for distances of a few meters (they would never have been detected and medical X-ray machines would not work if this was not the case) the Earth's atmosphere is thick enough that virtually none are able to penetrate from outer space all the way to the Earth's surface. X-rays in the 0.5 - 5 keV range, where most celestial sources give off the bulk of their energy, can be stopped by a few...

2004-10-19 04:45:43

Hertzsprung-Russell Diagram -- In stellar astronomy, the Hertzsprung-Russell diagram (H-R diagram) shows the relation between the absolute magnitude and the spectral types of stars. It was invented around 1910 by Ejnar Hertzsprung and Henry Norris Russell. There are two equivalent forms. One is the observer's form which plots the color of the star on one axis and the absolute magnitude on the other axis. The theoretician's form plots the temperature of the star on one axis and the...

2004-10-19 04:45:43

X-ray Pulsar -- This dramatic artist's vision shows a city-sized neutron star centered in a disk of hot plasma drawn from its enfeebled red companion star. Ravenously accreting material from the disk, the neutron star spins faster and faster emitting powerful particle beams and pulses of X-rays as it rotates 400 times a second. Could such a bizarre and inhospitable star system really exist in our Universe? Based on data from the orbiting Rossi X-Ray Timing Explorer (RXTE) satellite,...

2004-10-19 04:45:43

X-ray Burster -- X-ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from...

2004-10-19 04:45:43

X-ray Binaries -- X-ray binaries are a class of binary stars that are very luminous in X-rays. The X-rays are produced by matter falling from one component (usually a relatively normal star) to the other component, which is a neutron star or a black hole. The infalling matter releases gravitational potential energy, up to several tens of per cent of its rest mass as X-rays. (Hydrogen fusion releases about 0.7 per cent of rest mass) X-ray binaries are further subdivided into...

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Word of the Day
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'