Rare Space Experiment Gives Clues About the Fundamental Structure of the Universe (IMAGE)

Penn State

Rare Space Experiment Gives Clues About the Fundamental Structure of the Universe

Caption

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.

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NASA/Sanoma State University/Aurore Simonnet

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