在浩瀚的宇宙中,究竟有多少个星系?有外星人吗?月亮为什么有圆缺?星星为什么掉不下来?这些问题非常有趣,宇宙的探索正是从这些问题和人们的好奇心开始的。而今天,我们的天文课程同样从这些问题开始。接下来,我将以以下四个变化为例和大家分享我校中关村部的天文课程:从无到有、从静到动、从少到多、从自己到大家。 How many galaxies are there in the vast universe? Are there any aliens? Why is the moon lacking? Why can not the stars fall? These questions are very interesting. The exploration of the universe starts from these problems and people’s curiosity . Today, our astronomy course also starts with these questions. Next, I will take the following four changes as an example to share the astronomy courses of Zhongguancun Department of our school: from scratch, from calm to moving, from less to more, from myself to everyone.