카테고리 없음
blog.naver.com/celllee/222167377041
apogee(원지점), perigee(근지점), ecliptic(황도), Moon's path(백도), node(교점), eclipse(일식,월식)
today the figure of the apogee of one planet, tomorrow the nodes of another . . . (제본 89p. 7~8번째...
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