Cosmic Explosion Defies Rules of the Universe
The brightest explosions in space are supposed to be one-time events. This one went off again and again. On July 2, NASA’s Fermi Gamma-ray Space Telescope picked up a puzzling signal, later confirmed by Europe’s Very Large Telescope in Chile: a gamma-ray burst (GRB) that lasted a full day and repeated in discrete flashes. Astronomers … Read more