Stellarium 宇宙教学

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.
It is being used in planetarium projectors. Just set your coordinates and go.

http://www.stellarium.org/

说明:适合五年级的科学老师。里面有很多关于宇宙，星球和星座的资料。