Search results
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.
May 2, 2024 · 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 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...
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 6, 2021 · New evidence from NASA's Hubble Space Telescope suggests that white dwarf stars could continue to burn hydrogen in the final stages of their lives, causing them to appear more youthful than they actually are.
The remnant of that core, which are made mostly of carbon and oxygen, is a white dwarf roughly the diameter of Earth, but far more massive. Some white dwarfs are also created in binary systems, where the gravity from a companion object strips the outer layers of the star off, exposing the core.
Mar 23, 2008 · These extremely old, dim "clockwork stars" provide a completely independent reading on the age of the universe. Pushing the limits of its powerful vision, NASA’s Hubble Space Telescope uncovered the oldest burned-out stars in our Milky Way Galaxy.
Apr 17, 2023 · 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.
Dec 4, 2007 · 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.
