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  1. White Dwarf
    1995 · Science fiction · 1h 40m

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  1. en.wikipedia.org › wiki › White_dwarfWhite dwarf - Wikipedia

    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.

  2. Mar 4, 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.

  3. Apr 25, 2023 · The white dot in the center of this nebula is a white dwarf; it’s lighting up the receding cloud of gas that once made up the star. The colors identify various elements like hydrogen, helium ...

  4. The brightest star in the nighttime sky, Sirius, or the Dog Star, greatly outshines its white dwarf companion, Sirius B. At 8.6 light-years away, Sirius B is the nearest known white dwarf star to ...

  5. May 2, 2024 · White dwarf stars, so called because of the white colour of the first few that were discovered, are characterized by a low luminosity, a mass on the order of that of the Sun, and a radius comparable to that of Earth. Because of their large mass and small dimensions, such stars are dense and compact objects with average densities approaching ...

    • The Editors of Encyclopaedia Britannica
  6. Oct 19, 2023 · The estimated life span of a white dwarf is 5 billion years or more and during this time, it cools off. White dwarfs are believed to have a surface temperature of less than 10,000 Kelvin and, if that’s the case, a planet as close as 0.005 to 0.02 AU (Astronomical Unit) could potentially be habitable for life to develop.

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  8. imagine.gsfc.nasa.gov › science › objectsImagine the Universe!

    Sep 23, 2021 · An Artist's conception of the evolution of our Sun (left) through the red giant stage (center) and onto a white dwarf (right). A typical white dwarf is half as massive as the Sun, yet only slightly bigger than Earth. An Earth-sized white dwarf has a density of 1 x 10 9 kg/m 3 . Earth itself has an average density of only 5.4 x 10 3 kg/m 3.

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