ray flash seen in March came from a distant galaxy nearly four billion light years away where a Sun-sized star was being eaten by a black hole, US astronomers said Thursday. The energy from the cataclysmic blast is still being observed two and a half months later, said the study published in the journal Science. A closer look at the satellite data has confirmed that a star about the same size as the sun was being devoured 3.8 billion light years away. The entire event may have been set off by a star that just ventured too close to a black hole at the center of the galaxy.