Definitions for white dwarf
white dwarf

Princeton's WordNetRate this definition:0.0 / 0 votes

1. white dwarf, white dwarf starnoun

   a faint star of enormous density

WiktionaryRate this definition:0.0 / 0 votes

1. white dwarfnoun

   A dying star of low or medium mass, more solid and dense but less bright than the sun.

ChatGPTRate this definition:0.0 / 0 votes

1. white dwarf

   A white dwarf is a small, very dense, hot star that represents the final evolutionary stage of stars like our own Sun. It is composed mostly of degenerate matter, typically has the mass of approximately the Sun, while its volume is comparable to that of Earth. A white dwarf no longer undergoes nuclear fusion and, over billions of years, will eventually fade and cool to form a black dwarf.

WikidataRate this definition:0.0 / 0 votes

1. White dwarf

   A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter. They are very dense; a white dwarf's mass is comparable to that of the Sun, and its volume is comparable to that of the Earth. Its faint luminosity comes from the emission of stored thermal energy. The nearest known white dwarf is Sirius B, 8.6 light years away, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun. The unusual faintness of white dwarfs was first recognized in 1910 by Henry Norris Russell, Edward Charles Pickering, and Williamina Fleming, p. 1 the name white dwarf was coined by Willem Luyten in 1922. White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to become a neutron star—over 97% of the stars in our galaxy, §1. After the hydrogen–fusing lifetime of a main-sequence star of low or medium mass ends, it will expand to a red giant which fuses helium to carbon and oxygen in its core by the triple-alpha process. If a red giant has insufficient mass to generate the core temperatures required to fuse carbon, around 1 billion K, an inert mass of carbon and oxygen will build up at its center. After shedding its outer layers to form a planetary nebula, it will leave behind this core, which forms the remnant white dwarf. Usually, therefore, white dwarfs are composed of carbon and oxygen. If the mass of the progenitor is above 8 solar masses but below 10.5 solar masses, the core temperature suffices to fuse carbon but not neon, in which case an oxygen-neon–magnesium white dwarf may be formed. Also, some helium white dwarfs appear to have been formed by mass loss in binary systems.

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1. • Star

How to pronounce white dwarf?

1. Alex

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   David

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   Mark

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   Daniel

   British

   Libby

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   Australian

   Hayley

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How to say white dwarf in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of white dwarf in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of white dwarf in Pythagorean Numerology is: 9

Examples of white dwarf in a Sentence

1. Tinggui Wang:

   A white dwarf is a very compact star, as such, close to the star, the gradient of the gravitational field can be very large.

2. Ted Williams:

   But there is another class of compact objects called white dwarfs, bigger, the size of the earth. So rather than 10 kilometers in size we are looking at 6,000 kilometers and we’ve just discovered the very first white dwarf pulsar.

3. Lisa Kaltenegger:

   The news of another planet found circling a white dwarf is exciting, offering additional proof that planets exist around dead stars after our paper last year reported on the first one ever found.

4. Steven Parsons:

   This pulsating white dwarf we discovered is extremely important since we can use the binary motion and the eclipse to independently measure the mass and radius of this white dwarf, which helps us determine what it is made.

5. David Bennett:

   Earth's future may not be so rosy because it is much closer to the Sun, if humankind wanted to move to a moon of Jupiter or Saturn before the Sun fried the Earth during its red supergiant phase, we'd still remain in orbit around the Sun, although we would not be able to rely on heat from the Sun as a white dwarf for very long.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=white dwarf
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/White_Dwarf
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=white dwarf