News tagged with white dwarfs

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Telescopes help solve ancient supernova mystery

(PhysOrg.com) -- A mystery that began nearly 2,000 years ago, when Chinese astronomers witnessed what would turn out to be an exploding star in the sky, has been solved. New infrared observations from NASA's ...

Oct 24, 2011
4.4 / 5 (11) 8 | with audio podcast

G299.2-2.9, a middle-aged supernova remnant

(PhysOrg.com) -- G299.2-2.9 is an intriguing supernova remnant found about 16,000 light years away in the Milky Way galaxy. Evidence points to G299.2-2.9 being the remains of a Type Ia supernova, where a white ...

Oct 13, 2011
not rated yet 3 | with audio podcast

Are stellar explosions created equal?

Cosmic distances are difficult to grasp and no less difficult to measure. When it comes to other galaxies or even remote parts of our own Milky Way, distance measurements are nothing but assessments, derived from indirect ...

Aug 22, 2011
5 / 5 (1) 7

White Dwarf Stars Consume Rocky Bodies

“I love rocky road… So won’t you buy another gallon, baby…” Yeah. We all love rocky road ice cream, but what do stars like to snack on? In the case of the white dwarf star it would ...

Aug 16, 2011
5 / 5 (4) 0

Team finds Type Ia supernovae parents

Type Ia supernovae are violent stellar explosions whose brightness is used to determine distances in the universe. Observing these objects to billions of light years away has led to the discovery that the universe is expanding ...

Aug 11, 2011
5 / 5 (6) 0 | with audio podcast

A cosmic inkblot test

(PhysOrg.com) -- If this were an inkblot test, you might see a bow tie or a butterfly depending on your personality. An astronomer would likely see the remains of a dying star scattered about space -- precisely ...

Aug 11, 2011
5 / 5 (3) 1

Pan-STARRS discovers two super supernovae

Supernovae are the brightest phenomenon in the current universe. As massive stars die as supernovae, they briefly outshine the rest of the stars in their galaxy and are visible, at least once the light gets ...

Jul 22, 2011
5 / 5 (5) 1

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

'Zombie' stars key to measuring dark energy

"Zombie" stars that explode like bombs as they die, only to revive by sucking matter out of other stars. According to an astrophysicist at UC Santa Barbara, this isn't the plot for the latest 3D blockbuster ...

Jun 30, 2011
3.2 / 5 (6) 2 | with audio podcast

'Odd couple' binary makes dual gamma-ray flares

(PhysOrg.com) -- In December 2010, a pair of mismatched stars in the southern constellation Crux whisked past each other at a distance closer than Venus orbits the sun. The system possesses a so-far unique ...

Jun 29, 2011
4 / 5 (4) 3 | with audio podcast