英语词汇“m-type star”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

10. Astronomy. In form M. In the system of classification of stellar spectra into divisions: the division comprising the spectra of the coolest stars, with molecular (particularly titanium oxide) absorption bands; chiefly attributive (esp. in M-star, M-type star), designating a red star with a surface temperature of approx. 2,400–3,500 K which emits such a spectrum.

ΚΠ

1890 E. C. Pickering Draper Catal. Stellar Spectra in Ann. Astron. Observatory Harvard Coll. 27 3 When a spectrum is of the third type it is indicated by the letter M.

1957 Encycl. Brit. XXI. 320/1 In the Draper classification, now universally recognized, a continuous sequence of types is recognized denoted by the letters O, B, A, F, G, K, M... The sequence O to M corresponds to progression in colour from blue to red, and progression in temperature from the hottest to the coolest stars.

1977 Whitaker's Almanack 152/2 The M stars, like Betelgeuse, show very complex molecular spectra, chiefly of titanium oxide.

1978 J. M. Pasachoff & M. L. Kutner University Astron. ii. 40 M stars are cooler yet... Betelgeuse is an example of such a reddish star of spectral class M.

1991 C. A. Ronan Nat. Hist. Universe 84/2 Very small stars, of about a quarter the mass of the Sun, enter as M-type red dwarfs.

单词	m-type star
释义	> as lemmas M-type star 10. Astronomy. In form M. In the system of classification of stellar spectra into divisions: the division comprising the spectra of the coolest stars, with molecular (particularly titanium oxide) absorption bands; chiefly attributive (esp. in M-star, M-type star), designating a red star with a surface temperature of approx. 2,400–3,500 K which emits such a spectrum. ΚΠ 1890 E. C. Pickering Draper Catal. Stellar Spectra in Ann. Astron. Observatory Harvard Coll. 27 3 When a spectrum is of the third type it is indicated by the letter M. 1957 Encycl. Brit. XXI. 320/1 In the Draper classification, now universally recognized, a continuous sequence of types is recognized denoted by the letters O, B, A, F, G, K, M... The sequence O to M corresponds to progression in colour from blue to red, and progression in temperature from the hottest to the coolest stars. 1977 Whitaker's Almanack 152/2 The M stars, like Betelgeuse, show very complex molecular spectra, chiefly of titanium oxide. 1978 J. M. Pasachoff & M. L. Kutner University Astron. ii. 40 M stars are cooler yet... Betelgeuse is an example of such a reddish star of spectral class M. 1991 C. A. Ronan Nat. Hist. Universe 84/2 Very small stars, of about a quarter the mass of the Sun, enter as M-type red dwarfs. extracted from Mn. < as lemmas
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> as lemmas