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A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to the Sun's, while its volume is comparable to Earth's. A white dwarf's low luminosity comes from the emission of residual thermal energy; no fusion takes place in a white dwarf.
White dwarfs are stars that have burned up all of the hydrogen they once used as nuclear fuel. Fusion in a star's core produces heat and outward pressure, but this...
25 de abr. de 2023 · White dwarfs are the hot, dense cores of dead stars that mark the final stage of evolution for most stars, including our sun. Learn how they are born, what they are made of, and how they can explode or fade away in this astronomy essentials article.
14 de jun. de 2024 · Learn about the definition, size, mass, life cycles, and facts of white dwarf stars, the dense and compact remnants of intermediate- and low-mass stars. Find out how they are supported by degeneracy pressure, what is the Chandrasekhar limit, and how they evolve and cool down.
4 de mar. de 2022 · The cool, dim star at the center of the blue haze cloud is a white dwarf. The planetary nebula NGC 2452 is located in the southern constellation of Puppis. (Image credit: ESA/Hubble & NASA ...
Learn about the fascinating properties and evolution of white dwarfs, the final stage of most stars in the universe, from NASA experts.
23 de mar. de 2008 · Learn how NASA's Hubble Space Telescope revealed the oldest burned-out stars in our Milky Way Galaxy, which are 12-13 billion years old. These ancient white dwarf stars help astronomers determine the age of the universe independently.
