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Astronomers discover a star that would not die

9 November 2017 Astronomy Now

Supernovae, the explosions of stars, have been observed in the thousands and in all cases they marked the death of a star. Astronomers at Las Cumbres Observatory have discovered a remarkable exception — a star that exploded multiple times over a period of more than fifty years. Their observations are challenging existing theories on these cosmic catastrophes.

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Supernova observed colliding with its companion star

20 May 2015 Astronomy Now

Type Ia supernovae are violent stellar explosions that shine as some of the brightest objects in the universe, but there are still many mysteries surrounding their origin. Now a team of astronomers have witnessed a supernova smashing into a nearby star, shocking it, and creating an ultraviolet glow that reveals the size of the companion.