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Gamma ray bursts are the most powerful explosions known in the universe. The light from the most distant gamma ray burst seen yet, dubbed GRB 090423, reached our world even from about 13 billion light-years away this year. That explosion, which lasted just a little more than a second, released roughly 100 times more energy than our sun will release in its entire 10 billion year lifetime. It likely originated from a dying star 30 to 100 times larger than the sun.
Via Dr. Stefan Gruenwald
