In order to install System Maker 1.4 using the button below, you must first  install Win Zip which is 
  available here. Here is a tutorial that shows you how System Maker creates an .ssc file for Celestia.
  
 
  Your system must include, at least,
  •
  
  3 terrestrial planets
  •
  
  3 jovian planets   with appropriate moons
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  An asteroid belt with at least 4 minor planets
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  1 outer ice planet similar to one of the larger Kuiper objects
  •
  
  2 comets
  
 
 
 
 
 
  Terrestrial Planets
  In our solar system, we have 
  Mercury, Venus, Earth and Mars.
  Recall that terrestrial planets have 
  solid surfaces and spin relatively 
  slowly.  They may have a thin 
  atmosphere of carbon dioxide, but that atmosphere can 
  evolve into another form.  Your terrestrial planet may 
  have a moon or two, but no more.
   
 
  
 
 
 
 
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  Jovian Planets
  In our solar system, we have 
  Jupiter, Saturn, Uranus and 
  Neptune.
  Jovian planets consist primarily of 
  gas and rotate in less than 18 
  hours.   Your jovian planets should each have at least 
  four moons of various types.  You may wish to add rings 
  to your jovian planet.
   
 
  
 
 
 
 
 
  Asteroids
  You just need to create four 
  different asteroids for your 
  system 
  The asteroids we know of vary from a 
  few hundred meters across to as much 
  as 900 kilometers.  Their rotation rates average five or six hours, 
  but there are exceptions.  
 
  
 
 
 
 
 
  Ice Planets
  Out around Pluto, we find 
  hundreds of icy planets.
  Although there are at least hundreds of 
  objects in the Kuiper Belt, you need 
  create just one.  It should be about 2,000 
  kilometers in diameter, and may have a moon as a companion.  
  You should be ready to describe the surface features of this 
  planet.
 
  
 
 
 
 
 
  Comets 
  Millions of comets out there.  You 
  need to make just two.
  Your comet nucleus should be between 
  3 and 5 kilometers in diameter.  A comet 
  nucleus will typically rotate in a matter of 
  hours.  You must have the correct orbit for your comet, one with 
  a high eccentricity and tilted with respect to the ecliptic.