Tuesday, November 12, 2013

Researchers Shed New Light on Dark Energy, Cosmic Speed-up

via http://phys.org/news

The detailed, all-sky picture of the Cosmic Microwave Background in the infant universe reveals 13.77 billion year old temperature fluctuations (shown as color differences) that correspond to the seeds that grew to become the galaxies. Credit: NASA/WMAP Science Team

In a new study, Dartmouth researchers rule out a controversial theory that the accelerating expansion of the universe is an illusion.

While the findings don't explain the cosmic speed-up, they eliminate one provocative possibility that our planet, solar system and galaxy are at the center of the and that there is no . The findings appear in the journal Physical Review D. A PDF of the study is available on request.
The 2011 Nobel Prize was awarded for the discovery that the expansion of the universe is accelerating. One leading idea to explain the acceleration is a new, mysterious substance called dark energy, which is thought to make up nearly three-fourths of the energy of the universe. But another alternative is that the Earth, our solar system and Milky Way galaxy are at the center of the universe. That theory violates the standard assumption that the universe has no center, but if true, then could be explained without dark energy or any new laws of physics

 Read more at: http://phys.org/news/2013-11-dark-energy-cosmic-speed-up.html#jCp

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