News tagged with megaparsec

Hubble rules out one alternative to dark energy

(PhysOrg.com) -- Astronomers using NASA's Hubble Space Telescope have ruled out an alternate theory on the nature of dark energy after recalculating the expansion rate of the universe to unprecedented accuracy.

Mar 14, 2011
4.6 / 5 (25) 92 | with audio podcast

Search results for megaparsec

How fast is the universe expanding?

The Universe is expanding, but how quickly is it expanding? How far away is everything getting from everything else? And how do we know any of this anyway?

Feb 10, 2015
4.3 / 5 (27) 13

Why is Andromeda coming toward us?

I don't want to alarm you, but there's a massive galaxy heading our way and will collide with us in a few billion years. But aren't most galaxies speeding away? Why is Andromeda on a collision course with ...

Jan 23, 2015
3.4 / 5 (28) 27

10 facts about the Milky Way

The Milky Way Galaxy is an immense and very interesting place. Not only does it measure some 100,000–120,000 light-years in diameter, it is home to planet Earth, the birthplace of humanity. Our Solar System ...

Dec 04, 2014
4.9 / 5 (62) 6

New supernova likely arose from massive Wolf-Rayet star

They've been identified as possible causes for supernovae for a while, but until now, there was a lack of evidence linking massive Wolf-Rayet stars to these star explosions. A new study was able to find a "likely" link between this star type and a supernova called SN ...

May 22, 2014
4.3 / 5 (9) 20

When dark energy turned on (Update)

(PhysOrg.com) -- Some six billion light years distant, almost halfway from now back to the big bang, the universe was undergoing an elemental change. Held back until then by the mutual gravitational attraction ...

Mar 30, 2012
4.1 / 5 (20) 67 | with audio podcast

List of search results for megaparsec