Supernova Super Hero

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As you read these words, a former star is blasting its remains into space, spreading the chemical elements forged during its life into the interstellar brew of atoms….
…well, not exactly as you’re reading these words. In fact, the stellar death in question took place 21 million years ago, but so far away that its light is only now reaching Earth.
You can see it yourself. The supernova is located in the galaxy M-101 in Ursa Major, the Big Bear–which most of us identify as the Big Dipper. It can be found above the Dipper, forming a squat triangle with the two end stars of the handle.  more...