Solar
System Simulator
is the advanced version
of Orbit Game :-OG
Solar System Simulator Requires
you to put up to 9 planets
into orbit.
With Orbit Game :-OG,
its just 1.
If you
have not played
Orbit Game :-OG, then
Solar System Simulator
is going to be a bit too
tricky for you,
unless you have studied Physics
at a reputable academy.
Download
Orbit Game :-OG
Download Solar Sim 2
You can install both at
the same time if you like
:-j