NASA | Einstein's Cosmic Speed Limit
submitted by G.I.F.T.S.
on 12/17/13
1
To find out more visit: www.nasa.gov/mission_pages/GLAST/news/first_year.html
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.
Stefanie Misztal and Scott Wiessinger produced and edited this video.
