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After 400 Years, Debris From This Supernova Is Still Not Slowing Down – ScienceAlert

In 1604, a white dwarf star went supernova. This is quite normal behaviour for a white dwarf star; but this one, at a distance of just 20,000 light-years from Earth, was visible to the naked eye, and documented by astronomers around the world, includ

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In 1604, a white dwarf star went supernova. This is quite normal behaviour for a white dwarf star; but this one, at a distance of just 20,000 light-years from Earth, was visible to the naked eye, and documented by astronomers around the world, including German astronomer Johannes Kepler.
Kepler’s Supernova, as it came to be known, is still expanding to this day, the guts of the star blasting out into space. And, according to new research, it’s not slowing down. Knots of material in the ejecta a…

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