This image of the Crab Nebula in x-rays shows the pulsar clearly spinning at the nebula’s center. (Credit: NASA/CXC/ASU/J. Hester et al.)

Astronomers using the Tibet AS-gamma Experiment have discovered the highest-energy light ever measured from an astrophysical source. Photons streaming from the Crab Nebula were recently measured at energies well over 100 tera-electronvolts (TeV). That’s a trillion electron volts, or some 10 times the maximum energy that the Large Hadron Collider sees when