Universe 

Gamma-ray Burst Photon Delay as Expected by Quantum Gravity

In this illustration, one photon (purple) carries a million times the energy of another (yellow). Some theorists predict travel delays for higher-energy photons, which interact more strongly with the proposed frothy nature of space-time. Yet Fermi data on two photons from a gamma-ray burst fail to show this effect, eliminating some approaches to a new theory of gravity.


Credits

Cruz deWilde (Avant Gravity): Lead Animator
Julie McEnery (NASA/GSFC): Scientist
Francis Reddy (SPSYS): Writer
Please give credit for this item to:
NASA/Sonoma State University/Cruz deWilde/Aurore Simonnet

Short URL to share this page:
http://svs.gsfc.nasa.gov/goto?10489

Missions:
Fermi Gamma-ray Space Telescope
GLAST

Data Used:
Fermi None

This item is part of these series:
Fermi
Astrophysics Animations
Astrophysics Stills

Keywords:
SVS >> Gamma Ray
SVS >> HDTV
DLESE >> Space science
SVS >> Gamma Ray Burst
SVS >> Astrophysics
SVS >> Universe
SVS >> GLAST
SVS >> Space
SVS >> Gamma Ray Observatory
SVS >> Fermi
SVS >> Astronomy
NASA Science >> Universe