A white dwarf survived a supernova explosion – Space.com

Astronomers have discovered a white dwarf that narrowly escaped its own thermonuclear explosion, raising questions about how and why these stars create supernovae.

a white dwarf is the evolutionary end point of the sunlike a star. After this star swells to become red giantthen runs out of fuel required for nuclear fusion reactions, the star ejects its outer layers to form a planetary nebula, or a shell of circulating gas. When the nebula expands and dissipates, it leaves behind the inert core of the star, which is what we call a white dwarf.

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