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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 remnants of long-dead stars. They are stellar cores, left behind when stars exhaust their fuel supplies and blow their gases into space.
6 days ago · 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 radius comparable to that of Earth.
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...
Sep 23, 2021 · 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.
Mar 23, 2008 · Pushing the limits of its powerful vision, NASA’s Hubble Space Telescope uncovered the oldest burned-out stars in our Milky Way Galaxy. These extremely old, dim “clockwork stars” provide a completely independent reading on the age of the universe. The ancient white dwarf stars, as seen by Hubble, are 12-13 billion years old.
Apr 17, 2023 · 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. Click
White Dwarfs - NASA. NASA Supports Burst Test for Orbital Reef Commercial Space Station. NASA’s 21st Northrop Grumman Mission Launches Scientific Studies to Station. Eileen Collins Broke Barriers as America’s First Female Space Shuttle Commander.
Feb 2, 2023 · Astronomers using NASA's Hubble Space Telescope have for the first time directly measured the mass of a single, isolated white dwarf — the surviving core of a burned-out Sun-like star. Researchers found that the white dwarf is 56 percent the mass of our Sun.
