I am currently loading a new PC with FSX & FS2004 software collected over the years and came across various planetariums including Meade astronomy s/w stored away amongst my collection of CD'S/DVD'S. None of these seem to want to work with Win7-64.
Coincidentally, this week, I came across a free planetarium called Stellarium which provides most of the usual functions found in previous types I've used plus the ability to zoom into various objects showing planetary detail and also surface detail of Martian/Jovian moons, etc.
It can be downloaded on www.stellarium.org - about 51MB and occup