| 单词 | main sequence |
| 释义 | > as lemmasmain sequence main sequence n. Astronomy (on a Hertzsprung–Russell diagram) a continuous and distinctive diagonal band of star types extending from the top left of the diagram (hot, bright stars) to the lower right (cool, dim stars); frequently as a modifier.Stars on the main sequence (including the sun) are the most numerous type in the universe and are called dwarfs. ΘΚΠ the world > the universe > star > kind of star > by spectrum > [noun] Sirian1900 helium star1904 main sequence1925 1925 H. N. Russell in Nature 8 Aug. 209/1 The main sequence (a name suggested by Prof. Eddington), for which the luminosity diminishes rapidly, with increasing redness. 1929 J. H. Jeans Universe around Us (1930) vi. 349 The main-sequence belt of stable configurations for stars of the same spectral type as the sun..extends roughly between stellar absolute magnitudes, 4.88 and 3.54. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XIII. 106/2 Stars that do not belong to the main sequence fall into two main groups: red giants..and white dwarfs... Modern theoretical work indicates that red giants and white dwarfs began their stellar careers as normal main-sequence stars. 1995 M. Amis Information (1996) 65 More proximately we are warmed and hatched and raised by a steady-state H-bomb, our yellow dwarf: a second-generation star on the main sequence. 2014 Space Daily (Nexis) 26 Mar. These bigger cousins to the Sun differ from our home star in many important ways... F-types likely represent the brightest and hottest main-sequence stars that could plausibly allow life to form. < as lemmas |
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