The satellite is refers around revolves the natural heavenly body orthe artificial heavenly body which on the planetary orbit The Moon is the most obvious natural satellite In solarsystem,besides Mercury and Venus,other planets all has the The solar system known natural satellite total (did notcalculate constitution planet link fragment) at least has Thenatural satellite is the finger ring circles the planet revolution thestar,but the planet is surrounding the star 卫星是指在围绕行星轨道上运行的天然天体或人造天体 月球就是最明显的天然卫星的例子在太阳系里,除水星和金星外,其他行星都有天然卫星太阳系已知的天然卫星总数(不算构成行星环的碎块)至少有40颗天然卫星是指环绕行星运转的星球,而行星又环绕着恒星运转