词源 |
perigee n."point at which a celestial body is nearest the Earth," 1590s, from Modern Latin perigeum (15c.), from Late Greek peregeion, used by Ptolemy as a noun, properly neuter of adjective perigeios "near the earth," from peri ges, from peri "near" (see peri-) + ges, genitive of gē "earth" (see Gaia). Now only of the moon, formerly used also for the corresponding point in the orbit of any celestial body. Compare apogee. updated on March 31, 2020 |