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NASA, ESA, P. Challis and R. Kirshner (Harvard-Smithsonian Center for Astrophysics)

The Hubble telescope has taken many pictures over its lifetime of the tattered remains of an exploded star, called Supernova 1987A. Astronomers first spotted the stellar blast 20 years ago, in 1987. These six Hubble snapshots, taken over several years, show a growing number of bright spots on a ring of material around the exploded star. Debris from the supernova is slamming into the ring and lighting it up.