NASA photo
Supernovas are some of the most powerful and visually striking events observed during the human voyage to the beginning of the universe. Releasing more energy in a single moment than Sol will over its entire lifetime, a supernova is luminous enough to shine brighter in the night sky than entire galaxies during one moment in space and time, before slowly fading from view over several weeks or months. The force of a supernova expels a large percentage of a star's mass into the darknes...

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