“red dwarf”的概念、定义、翻译、参考文献-科学参考

red dwarf

Physics

A dim and cool dwarf star (i.e. one that has a low luminosity and a lower temperature than all other dwarf stars). The diameter of such stars is about half that of the sun and their surface temperature lies between 2000 K and 3000 K. It is thought that red dwarf stars are the most common type of star in the universe. The name red dwarf was suggested by the Danish astronomer Ejnar Hertzsprung (1873–1969).

A red dwarf white star is a star with a surface temperature less than 400 K, which is about 10 000 times fainter than the sun. In these stars radiation from the surface has cooled the star very rapidly.

Astronomy

A cool, faint, low-mass star lying at the lower end of the main sequence. Red dwarfs have masses and diameters less than half those of the Sun. They are red because of their low surface temperatures, less than 4000 K, and are of spectral type K or M. Red dwarfs are the most common type of star, and also the longest-lived, with potential lifetimes greater than the current age of the Universe. Because of their low luminosity, no more than 10% of the Sun's, they are inconspicuous. Barnard’s Star and Proxima Centauri are nearby examples. Many red dwarfs are flare stars.

Space Exploration

Any star that is cool, faint, and small (about one-tenth the mass and diameter of the Sun). Red dwarfs burn slowly, and have estimated lifetimes of 100 billion years. They may be the most abundant type of star, but are difficult to see because they are so faint. Two of the stars closest to the Sun, Proxima Centauri and Barnard's Star, are red dwarfs.

单词	red dwarf
释义	red dwarf Physics A dim and cool dwarf star (i.e. one that has a low luminosity and a lower temperature than all other dwarf stars). The diameter of such stars is about half that of the sun and their surface temperature lies between 2000 K and 3000 K. It is thought that red dwarf stars are the most common type of star in the universe. The name red dwarf was suggested by the Danish astronomer Ejnar Hertzsprung (1873–1969). A red dwarf white star is a star with a surface temperature less than 400 K, which is about 10 000 times fainter than the sun. In these stars radiation from the surface has cooled the star very rapidly. Astronomy A cool, faint, low-mass star lying at the lower end of the main sequence. Red dwarfs have masses and diameters less than half those of the Sun. They are red because of their low surface temperatures, less than 4000 K, and are of spectral type K or M. Red dwarfs are the most common type of star, and also the longest-lived, with potential lifetimes greater than the current age of the Universe. Because of their low luminosity, no more than 10% of the Sun's, they are inconspicuous. Barnard’s Star and Proxima Centauri are nearby examples. Many red dwarfs are flare stars. Space Exploration Any star that is cool, faint, and small (about one-tenth the mass and diameter of the Sun). Red dwarfs burn slowly, and have estimated lifetimes of 100 billion years. They may be the most abundant type of star, but are difficult to see because they are so faint. Two of the stars closest to the Sun, Proxima Centauri and Barnard's Star, are red dwarfs.
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