black dwarf
The theoretical celestial object that remains after a white dwarf has used up all of its fuel and cooled off completely to a solid mass of extremely dense, cold carbon. A white dwarf will eventually become a black dwarf unless it has a companion star from which it can take sufficient mass to pass the Chandrasekhar limit and collapse into a neutron star or black hole. No black dwarf has ever been observed. Because the estimated cooling time for a white dwarf is in the trillions of years, it is unlikely that there are many, if any, black dwarfs in our universe, which is only 12 to 18 billion years old. See Note at dwarf star.
Words Nearby black dwarf
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
How to use black dwarf in a sentence
"It's a dead white dwarf—a 'black dwarf', you might say," Morey replied.
Islands of Space | John W CampbellThe "black dwarf" was not written till a good many years after Ritchie's death.
Highways and Byways in The Border | Andrew LangBut apparently not in any earlier than The black dwarf, which was written in 1816, the year in which the poem was published.
Sir Walter Scott as a Critic of Literature | Margaret BallHis watchfulness availed him nothing, however, for no further sign of the black dwarf.
The Childerbridge Mystery | Guy BoothbyThis is "the black dwarf," or Sir Edward Mauley, the hero of the novel.
Character Sketches of Romance, Fiction and the Drama, Vol 1 | The Rev. E. Cobham Brewer, LL.D.
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