See 2500 stars, all 88 constellations, planets and the moonphase from 4713 BC 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. Print todays night sky ! Tiny program, but great planetarium, especially for teachers and students. Nice visuals, smooth animation, simple controls, good planet data too.