stellarium

Developers description:

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://stellarium.org/

1. Educational use: this software could be very useful in astronomy or other science classes. 2. Cost: 100% free, no registration. 3. This software would be most useful when you need to observe the sky. It displays stars, constellations, planets, nebulas and others things like ground, landscape, and atmosphere. If you are teaching about the sky this is a very useful visual tool. 4.