| 单词 | planetologist | 
| 释义 | planetologistn. Astronomy.   An expert in or student of planetology. ΘΚΠ the world > the universe > cosmology > astronomy > planetology > 			[noun]		 > person planetologist1928 1928    Funk & Wagnalls New Standard Dict. Eng. Lang. at Planetology  				Planetologist. 1966    Ann. N.Y. Acad. Sci. 140 289  				For the planetologist, it seems very important to be able to measure, even approximately, the relative amounts of oxygen, silicon, and aluminum in the surface layers of the planets. 1975    Nature 7 Aug. 455/3  				The development of a cratering chronology was one of the principal challenges to comparative planetologists studying impact bombardment of the terrestrial planets. 1993    Guardian 20 May  ii. 12/3  				Planetologists like the very slow kind [of terraforming process], which is similar to the natural evolution of the planets they study. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < | 
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