NASA | Einstein's Cosmic Speed Limit

Published 48 days ago

To find out more visit: http://www.nasa.gov/mission_pages/GLAST/news/first_year.html Want more? Subscribe to NASA on iTunes! http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=283424434 Or get tweeted by NASA:... more

To find out more visit: http://www.nasa.gov/mission_pages/GLAST/news/first_year.html Want more? Subscribe to NASA on iTunes! http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=283424434 Or get tweeted by NASA: http://twitter.com/NASAGoddard In its first year of operations, NASA’s Fermi Gamma-ray Space Telescope has mapped the entire sky with unprecedented resolution and sensitivity in gamma-rays, the highest-energy form of light. On May 10, 2009 a pair of gamma-ray photons reached Fermi only 900 milliseconds apart after traveling for 7 billion years. Fermi’s measurement gives us rare experimental evidence that space-time is smooth as Einstein predicted, and has shut the door on several approaches to gravity where space-time is foamy enough to interfere strongly with light. less

Tags: nasa goddard space flight center albert einstein einstein's cosmic speed limit light photons time space-time relativity quantum particles mechanics gamma ray burst universe science math theory everything