News tagged with companion star

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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 ...

Jul 29, 2010
4.9 / 5 (11) 4 | with audio podcast

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 ...

Jul 12, 2010
4.5 / 5 (12) 7 | with audio podcast

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 ...

Jun 30, 2010
4.5 / 5 (14) 6 | with audio podcast

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 ...

May 28, 2010
5 / 5 (2) 0 | with audio podcast

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 ...

Mar 25, 2010
4.8 / 5 (9) 1 | with audio podcast

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.

Mar 11, 2010
5 / 5 (10) 2

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 ...

Nov 30, 2009
4.7 / 5 (28) 9

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 ...

Sep 03, 2009
4.9 / 5 (16) 7

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 ...

Apr 20, 2009
4 / 5 (5) 0

Erratic black holes regulate their growth (w/Videos)

(PhysOrg.com) -- New results from NASA's Chandra X-ray Observatory have made a major advance in explaining how a special class of black holes may shut off the high-speed jets they produce. These results suggest ...

Mar 25, 2009
4.7 / 5 (11) 5