行星是绕着太阳转吗？并不完全是

行星并非严格绕着太阳运行，而是与太阳共同绕着一个质心公转。目前，这个质心位于太阳本体之外。

Do the planets revolve around the sun? Not exactly. The sun and planets orbit a common center of mass, which, right now, is outside the sun. The post Do the planets revolve around the sun? Not exactly first appeared on EarthSky .