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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.
Apr 25, 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.
Jun 14, 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, have a limiting mass, and cool down over time.
- The Editors of Encyclopaedia Britannica
Mar 4, 2022 · White dwarfs are hot, dense remnants of stars. They are the last observable stage of evolution for low and medium-mass stars including our sun.
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...
Mar 23, 2008 · Learn about the oldest burned-out stars in our Milky Way Galaxy, as seen by NASA's Hubble Space Telescope. These dim "clockwork stars" provide a completely independent reading on the age of the universe.
Sep 23, 2021 · Learn what white dwarfs are, how they form, and what makes them so dense and strange. Explore the properties, structure, and evolution of these stellar remnants with examples, images, and activities.
