See the brightest 2500 stars, all 88 constellations, all nine planets and the moonphase from 4713BC to 9999 AD from any location on earth. Click star on screen for detailed information. Geocentric and heliocentric views also available. Define your own five locations for quick switch. Tiny program, but great planetarium, especially for teachers and students. Print todays night sky ! Nice visuals, smooth animation, simple controls, good planet data. This is the Windows version of the classic Planetarium software of 1992. The DOS version didn't work with todays fast computer anymore. But it was downloaded for 13 years, and one of the first of its kind, especially the animantions and colors. If you need a quick overview when and where a planet, star is, this is your perfect joice. And it is really for free, no registration required. So try it and see yourself !