dwarf star


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dwarf star

n.
A star, such as the sun, having relatively low mass, small size, and average or below average luminosity.

dwarf star

n
(Celestial Objects) any luminosity class V star, such as the sun, lying in the main sequence of the Hertzsprung-Russell diagram. Also called: main-sequence star See also red dwarf, white dwarf

dwarf′ star′


n.
a star with relatively small mass and low or average luminosity, as the sun.
[1910–15]

dwarf star

A small star of low mass that gives off an average or below average amount of light. The sun is a dwarf star.
Did You Know? In the world of stars, even a dwarf is quite large. At 864,000 miles in diameter and more than 330,000 times the mass of Earth, our sun is still a dwarf star. But a dwarf star is indeed small compared with certain other kinds of stars, such as red giants. Dwarf stars come in several varieties. The type of star known as a white dwarf is in fact the remnant of a red giant that has burned nearly all its fuel. Because of the gravitational attraction of its atoms for each other, the star starts to collapse in on itself. After it contracts and blows its outer layers away, the red giant ends up as a white dwarf. A black dwarf is a burned-out white dwarf that no longer gives off detectable radiation. Astronomers also refer to brown dwarfs, which are not stars. A brown dwarf is bigger than Jupiter, the biggest planet in our solar system, but too small to carry on the sustained nuclear reactions that are needed to become a true star.
Translations

dwarf star

nZwerg(stern) m
References in periodicals archive ?
A new study suggests that TRAPPIST-1, a faint, M dwarf star with seven planets (S&T: June 2017, p.
It orbits a small red dwarf star half the size of the sun 600 light years away.
Sahu of the Space Telescope Science Institute in Baltimore, Maryland, focused on a distant star as its light was deflected around a nearby white dwarf star called Stein 2051 B.
RED Dwarf star Craig Charles says the show's longevity is down to the fact the stars are "still prepared to do it".
The planet, more than four times the mass of the Earth, is one of three that the team detected around a red dwarf star called Wolf 1061.
WASHINGTON (CyHAN)- On April 23, NASA's Swift satellite detected the strongest, hottest, and longest-lasting sequence of stellar flares ever seen from a nearby red dwarf star.
Washington, July 4 ( ANI ): Scientists have revealed that the controversial signals were not coming from the two planets, which might support life, orbiting the dwarf star Gliese 581.
The white dwarf star is the coldest ever detected - 5,000 times cooler than the centre of our sun at 2,700C.
The host star, Kepler 186, is an M1-type dwarf star, which means it will burn hydrogen forever, so there is ample opportunity to develop life around this particular star and, because it has just the right orbital period, water may exist in a liquid phase on this planet," explains Crepp, assistant professor of physics.
Novae are thought to occur when a white dwarf star in a binary system explodes.
Same goes for a scoop of blood orange that gets squeezed down to the density of a dwarf star.
Slightly closer to home, at least in our own galaxy, another study also published in Nature looks at a single red dwarf star in a way that is a step forward in astronomers' search for life beyond Earth.