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The explosion blasts the material off the surface and away, into space. It took 1300 years for the light from the dwarf nova, as it’s called, to reach the Earth, arriving in 1901. For a brief time, Nova GK Persei was among the brightest objects in the sky. It has faded in the subsequent decades, but the material from the blast still rushes away from the star. Observations of this object have been made for a long time, and now astronomers have made an incredible animation of it using actual data...