Huge 'star-quake' rocks Milky Way

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If the explosion had been just 10,000 light-years away, Earth could have suffered a mass extinction, it is said. "We figure that it's probably the biggest explosion observed by humans within our galaxy since Johannes Kepler saw his supernova in 1604," Dr Rob Fender, of Southampton University, UK, told the BBC News website.

Put probably wouldn´t have; it would have to have been a lot closer than that.