News tagged with companion star

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Where do supernovae come from?

(PhysOrg.com) -- Supernovae, the explosive deaths of massive stars, are among the most momentous events in the cosmos because they disburse into space all of the chemical elements that were produced inside ...

dateSep 17, 2010 in Astronomy
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Eclipsing pulsar promises clues to crushed matter

Astronomers using NASA's Rossi X-ray Timing Explorer (RXTE) have found the first fast X-ray pulsar to be eclipsed by its companion star. Further studies of this unique stellar system will shed light on some ...

dateAug 17, 2010 in Astronomy
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Brown Dwarf Found Orbiting a Young Sun-Like Star

(PhysOrg.com) -- Astronomers have imaged a very young brown dwarf, or failed star, in a tight orbit around a young nearby sun-like star. The discovery is expected to shed light on the early stages of solar ...

dateJul 29, 2010 in Astronomy
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Origin of Key Cosmic Explosions Still a Mystery

(PhysOrg.com) -- When a star explodes as a supernova, it shines so brightly that it can be seen from millions of light-years away. One particular supernova variety - Type Ia - brightens and dims so predictably ...

dateJul 12, 2010 in Astronomy
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Supernovae mystery solved

(PhysOrg.com) -- Supernovae are gigantic stellar explosions that can be seen across the entire universe. Type Ia supernovae are a relatively homogeneous class of stellar explosions, which researchers use as ...

dateJun 30, 2010 in General Physics
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The Polaris Cluster

(PhysOrg.com) -- A Cepheid star is one whose mass and age results in physical conditions that generate periodic oscillations in its photosphere. A Cepheid thus varies regularly in brightness, with a period ...

dateMay 28, 2010 in Astronomy
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Measuring a Monstrous Supernova

A rare Type Ia supernova whose progenitor star had a mass some two and a half times that of our sun - much more mass than a Type Ia progenitor should be able to accumulate before it explodes - has led members ...

dateMar 25, 2010 in Astronomy
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Getting WISE About Nemesis

Is our Sun part of a binary star system? An unseen companion star, nicknamed 'Nemesis,' may be sending comets towards Earth. If Nemesis exists, NASA's new WISE telescope should be able to spot it.

dateMar 11, 2010 in Astronomy
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Black hole caught zapping galaxy into existence?

(PhysOrg.com) -- Which come first, the supermassive black holes that frantically devour matter or the enormous galaxies where they reside? A brand new scenario has emerged from a recent set of outstanding ...

dateNov 30, 2009 in Astronomy
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XMM-Newton uncovers a celestial Rosetta stone

(PhysOrg.com) -- ESA's XMM-Newton orbiting X-ray telescope has uncovered a celestial Rosetta stone: the first close-up of a white dwarf star, circling a companion star, that could explode into a particular ...

dateSep 03, 2009 in Astronomy
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HARPS-NEF to comb Kepler targets for new Earths

Astronomers have announced plans to build an ultra-stable, high-precision spectrograph for the Science and Technology Facilities Council's 4.2-m William Herschel Telescope (WHT - part of the Isaac Newton Group ...

dateApr 20, 2009 in Astronomy
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