Planetarium at your PC

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.

features
1)default catalogue of over 600,000 stars
2)extra catalogues with more than 210 million stars
3)asterisms and illustrations of the constellations
4)images of nebulae (full Messier catalogue)
5)realistic Milky Way
6)very realistic atmosphere, sunrise and sunset
7)the planets and their satellites
8)interface
9)a powerful zoom
10)time control
11)multilingual interface
12)scripting to record and play your own shows
13)fisheye projection for planetarium domes
14)spheric mirror projection for your own dome
15)graphical interface and extensive keyboard control
16)telescope control
17)visualisation
18)equatorial and azimuthal grids
19)star twinkling
20)shooting stars
21)eclipse simulation
22)skinnable landscapes, now with spheric panorama projection
23)customisability
24)add your own deep sky objects, landscapes, constellation images,
25)scripts...

For Free download visit : http://www.stellarium.org