您即将离开北大未名BBS，访问
http://curious.astro.cornell.edu/about-us/46-our-solar-system/the-moon/observing-the-moon/142-why-are-the-moon-and-sun-sometimes-orange-or-red-beginner
该网址与北大未名BBS无关，提醒您访问时注意判断信息真伪。
继续访问