Something, somewhere, out there has gone off with one ultra-super-awesomely mega-ginormous bang. On March 19th, NASA's "Swift" satellite, dedicated to the study of gamma-ray bursts from the depths of the Universe, detected by far the biggest gamma-ray explosion ever recorded.
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GRB 080319B's optical afterglow was 2.5 million times more luminous than the most luminous supernova ever recorded, making it the most intrinsically bright object ever observed by humans in the universe.
Despite being a vast 7.5 billion light-years distant (and hence occurring at a time when the Universe was only about half its present age), it would have been visible with the naked eye to someone who happened to be looking in that direction in a dark, clear sky. Astronomers are now racking their brains to figure out what might have caused it.
Funny old place, the Universe.