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cataclysmic nuclear explosion in a white dwarf star

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About nova

A nova is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star that slowly fades over weeks or months. All observed novae involve white dwarfs in close binary systems, but causes of the dramatic appearance of a nova vary, depending on the circumstances of the two progenitor stars. The main sub-classes of novae are classical novae, recurrent novae (RNe), and dwarf novae. They are all considered to be cataclysmic variable stars.

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Facts from Wikidata (CC0). Image by NASA/CXC/M.Weiss via Wikimedia Commons (Public domain).

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