News tagged with dark energy

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Ticking stellar time bomb identified (w/ Video)

(PhysOrg.com) -- "One of the major problems in modern astrophysics is the fact that we still do not know exactly what kinds of stellar system explode as a Type Ia supernova," says Patrick Woudt, from the University ...

Nov 17, 2009
4.8 / 5 (12) 0

Holographic dark information energy

Holographic Dark Information Energy gets my vote for the best mix of arcane theoretical concepts expressed in the shortest number of words – and just to keep it interesting, it’s mostly about entropy.

May 30, 2011
4.3 / 5 (13) 19 | with audio podcast

What is the geometry of the universe?

One of the big questions in cosmology regards the shape of the universe. "Shape" in this case is not the distribution of galaxies, but rather the shape of space and time itself. In general relativity, space ...

Sep 24, 2014
4.5 / 5 (54) 40

Big rips and little rips

One of a number of seemingly implausible features of dark energy is that its density is assumed to be constant over time. So, even though the universe expands over time, dark energy does not become diluted, ...

Jul 04, 2011
4.8 / 5 (9) 37 | with audio podcast

Super-sharp radio 'eye' remeasuring the universe

(PhysOrg.com) -- Using the super-sharp radio "vision" of astronomy's most precise telescope, scientists have extended a directly-measured "yardstick" three times farther into the cosmos than ever before, an ...

Feb 19, 2011
4.6 / 5 (21) 16 | 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

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

The best way to measure dark energy just got better

(PhysOrg.com) -- Dark energy is a mysterious force that pervades all space, acting as a "push" to accelerate the Universe's expansion. Despite being 70 percent of the Universe, dark energy was only discovered ...

Jan 13, 2011
4.5 / 5 (11) 11 | with audio podcast