White dwarf - Wikipedia
网页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. [1]
White dwarfs: Facts about the dense stellar remnants | Space
网页2022年3月4日 · White dwarfs are what is left when stars like our sun have exhausted all of their fuel. They are dense, dim, stellar corpses — the last observable stage of evolution for low- and medium-mass...
What are white dwarf stars? How do they form? - EarthSky
网页2023年4月25日 · White dwarfs are the hot, dense remnants of long-dead stars. They are stellar cores, left behind when stars exhaust their fuel supplies and blow their gases into space.
White dwarf star | Definition, Size, Mass, Life Cycles, & Facts
网页2024年7月26日 · White dwarf star, any of a class of faint stars representing the endpoint of the evolution of intermediate- and low-mass stars. White dwarf stars are characterized by a low luminosity, a mass on the order of that of the Sun, and a …
White Dwarfs Facts, Information and Photos - National Geographic
网页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...
White Dwarf Stars - Imagine the Universe!
网页2021年9月23日 · A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only …
White Dwarfs - Imagine the Universe!
网页A low or medium mass star (with mass less than about 8 times the mass of our Sun) will become a white dwarf. A typical white dwarf is about as massive as the Sun, yet only slightly bigger than the Earth. This makes white dwarfs one of the densest forms of matter, surpassed only by neutron stars and black holes.
White Dwarfs - NASA
网页White Dwarfs - NASA. What’s Up: September 2024 Skywatching Tips from NASA. NASA’s SpaceX Crew-9 to Conduct Space Station Research. 9 Phenomena NASA Astronauts Will Encounter at Moon’s South Pole. Childhood Snow Days Transformed Linette Boisvert into a Sea Ice Scientist.
Neutron Stars and White Dwarfs - Center for Astrophysics
网页Stars like our Sun leave behind white dwarfs: Earth-size remnants of the original star’s core. More massive stars explode as supernovas, while their cores collapse into neutron stars: ultra-dense, fast-spinning spheres made of …
NASA – How White Dwarf Stars Get Their ‘Kicks’ - Science@NASA
网页2007年12月4日 · NASA’s Hubble Space Telescope is providing strong evidence that white dwarfs, the burned-out relics of stars, are given a “kick” when they form. The sharp vision of Hubble’s Advanced Camera for Surveys uncovered the speedy white dwarfs in the ancient globular star cluster NGC 6397, a dense swarm of hundreds of thousands of stars.
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