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Chandra Finds a Gamma Ray Blast Remnant - Universe Today
Combined data from the Chandra X-Ray Observatory and the Palomar 200-inch telescope have uncovered the remnant of a gamma-ray burst - one of the most powerful known explosions in the Universe - in our galactic neighborhood. W49B is a barrel-shaped nebula located 35,000 light-years from Earth. In the cosmic wreckage of the explosion, astronomers have found chemicals consistent with the collapsar model of a gamma-ray burst. In this model, a massive star forms inside a cloud of dust and gas and then becomes a black hole, creating a powerful explosion.