News tagged with white dwarfs

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The spectra of white dwarf stars

Yesterday I talked about the Higgs, and how its discovery has led to a flurry of articles about how it might apply to astrophysics. So today here's another example, and this one's interesting because it's ...

Oct 09, 2014
4.8 / 5 (8) 0

Galactic X-ray emissions originate from stars

(PhysOrg.com) -- A 25-year old astronomical mystery has been solved: Most of the diffuse X-ray emissions in the Milky Way do not originate from one single source but from so-called white dwarfs and from stars ...

May 05, 2009
4.6 / 5 (8) 2

Dead Stars Tell Story of Planet Birth

(PhysOrg.com) -- Astronomers have turned to an unexpected place to study the evolution of planets -- dead stars. Observations made with NASA's Spitzer Space Telescope reveal six dead "white dwarf" stars littered ...

Jan 05, 2009
4.4 / 5 (8) 1

Image: March of asteroids across dying star

(Phys.org) —In an unexpected juxtaposition of cosmic objects that are actually quite far from each other, a newly released image from NASA's Wide-Field Infrared Survey Explorer (WISE) shows a dying star, ...

Dec 13, 2013
4.9 / 5 (7) 0 | with audio podcast

Evolved stars locked in fatalistic dance

White dwarfs are the burned-out cores of stars like our Sun. Astronomers have discovered a pair of white dwarfs spiraling into one another at breakneck speeds. Today, these white dwarfs are so near they make ...

Jul 13, 2011
4.7 / 5 (7) 5 | with audio podcast

The Ring Nebula

The diversity of colours, shapes, and sizes of planetary nebulae make them fascinating objects. In this photo release Calar Alto presents a rather unique view combining both optical and near-infrared data ...

Nov 02, 2009
4.3 / 5 (7) 2

Helium pair have regular violent flare ups

(PhysOrg.com) -- A team of astronomers led by Dr Gavin Ramsay of Armagh Observatory have spotted violent eruptions from an interacting pair of stars that orbit around each other every 25 minutes. Unusually, ...

May 24, 2010
5 / 5 (6) 0 | with audio podcast