Jun 1, 2003 - Gamma ray bursts (GRB) are the largest known explosions in the Universe; immensely powerful, quick to fade, but usually incredibly far away. Astronomers with the National radio astronomy Observatory got lucky, though, when they analyzed a recent GRB and discovered it was only 2.6 billion light-years away (most are usually 4 times more distant). What causes these bursts is a mystery, but the theories usually incorporate black holes in some catastrophic way - colliding into another black hole; wrapping a magnetic field like a spring, etc. This close burst didn't answer the mystery, but it did allow the Astronomers to rule out one idea, that material from a GRB blasts out like "cannonballs". |