月相全过程的图: http://image2.sina.com.cn/IT/other/2004-02-28/U68P2T1D298803F13DT20040228180850.jpg http://image2.sina.com.cn/IT/other/2004-02-28/U68P2T1D298803F9DT20040228180850.jpg 一个月的月相变化如下: http://www.losn.com.cn/twahz/moon/3_2.htm