Satellite

(sat'el-lit.) [From L. satelles, an attendant.] (Ast.) A small, secondary planet, or one which revolves around a larger or primary planet: they are so named because always seen in attendance upon them, and completing the orbit of the sun along with them. The earth has one S., generally called the moon; Jupiter has 4; Saturn, 8; Uranus, 4; and Neptune, probably,2. [s. 798]