Astronomers discover sonic boom from powerful unseen explosion

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A team of astronomers has detected the sonic boom from an immensely powerful cosmic explosion, even though the explosion itself was totally unseen. The titanic eruption, known as a Gamma Ray Burst (GRB), was generated by the collapse of a massive star in a galaxy nearly 300 million light-years from Earth.

from Latest Science News -- ScienceDaily https://ift.tt/2O7lEEg

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