Beijing Planetarium is a national leader in public astronomy, a beloved civic visiting place, and one of Beijing’s most popular attractions. It contains two parts: Beijing Planetarium and Beijing Ancient Observatory. Beijing Planetarium consists of new building and the old Planetarium. The new facility has several exciting parts: Digital space theater, 3D theater, 4D theater, exhibition hall, two observatories. After 50 years of public use by roughly 18 million visitors, it’s under rebuilding and will be reopened in March 2008. There are a planetarium and two exhibition galleries in old Planetarium. Beijing Planetarium is one of the powerful planetaria in the world. It has made great contributions to popularize astronomy.