There are a number of planetarium simulators you can get commercially. Try the advertisements in Sky and Telescope magazine as a start, and look at Astronomy magazine too. Both of these carry many different products that display the planets, and predict lunar phases too. Also, there's a Shareware company called 'Software Labs' phone 206) 869-6729 that carries a few simple planetaria simulators for $4 a disk. Call them for their catalog.
Copyright 1997 Dr. Sten Odenwald
Return to Ask the Astronomer.