| 单词 | presolar | 
| 释义 | > as lemmaspresolar   presolar adj.  Brit. , U.S. chiefly Astronomy existing, occurring, or originating before the formation of the sun or another star; spec. constituting material from which the sun was subsequently formed; cf. prestellar adj. ΘΚΠ the world > the universe > star > kind of star > protostar > 			[adjective]		 prestellar1897 protostellar1968 presolar1973 1855    P. J. Bailey Spiritual Legend in  Mystic 		(ed. 2)	 75  				For sun and moon præsolar light precedes. 1877    P. J. Bailey Proem in  Festus 		(ed. 10)	 6  				Hints of life, Foreworldly, pencilled by pre-solar light, Or Paradisal sun. 1973    Sci. Amer. Apr. 61/3  				The molecules might be formed in the dense environs of a ‘presolar nebula’, that is, in the final phases of the collapse of a protostar into a self-luminous star. 1979    Nature 15 Feb. 556/1  				According to the second model..the presolar grains condensed in a late supernova that triggered the collapse of the solar nebula. 2004    Nature 29 Apr. p. vii/3  				Now using ion microscopy, presolar silicates have been identified in two primitive meteorites. < as lemmas | 
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