地ち球きゅう近きん傍ぼう天てん体たいちきゅうきんぼうてんたいMeanings1nounnear-Earth object; NEOastronomy›Technical astronomy term for asteroids or comets whose orbits bring them close to Earth.地ち球きゅう近きん傍ぼう天てん体たいの観かん測