Binary star systems question.

[LAX2489]

Would it be possible to make a binary or even trinary(if it even exists) star system with planets and such? If so, how could you make it that the suns orbit around each other instead of around a single point?
Thanks for any feed back. The goal i have have in mind would be a planetary system similar to the one in the movie "Pitch Black". Thanks again

Tom

[granthutchison]

At present the best you can do is define the secondary stars as if they were planets, but with a star texture applied and "Emissive true" set. As an example, here's a definition for stars B, C and D in the Alula Australis quadruple system:

Code: Select all

"Alula Australis B" "Alula Australis"   # fully specified orientation
{
   Texture "gstar.jpg"   # G0V
   Radius 760000      #

   Emissive true

   EllipticalOrbit {
      Period          59.878
      SemiMajorAxis   21.2
      Eccentricity    0.398
      Inclination   14.1
      AscendingNode   192.1
      ArgOfPericenter 188.7
      MeanAnomaly     29.6
   }

   RotationPeriod   260 # plausible guess
}

"Alula Australis C" "Alula Australis"   # fully specified orientation
{
   Texture "mstar.jpg"   # ~M3V from calc mass 0.4
   Radius 300000      #

   Emissive true

   Color   [ 1 0.7 0.7 ]

   EllipticalOrbit {
      Period          1.832
      SemiMajorAxis   0.48
      Eccentricity    0.53
      Inclination   137.0
      AscendingNode   298.1
      ArgOfPericenter 7.9
      MeanAnomaly     133.8
   }

   RotationPeriod   250 # plausible guess
}

"Alula Australis D" "Alula Australis/Alula Australis B"
{
   Texture "browndwarf.jpg"
   Radius 70000

   Emissive true

   Color   [ 1 0.7 0.7 ]

   EllipticalOrbit {
      Period          3.98
      SemiMajorAxis   9000000
      Eccentricity    0
   }

   RotationPeriod   5 # plausible guess
}

Grant

[LAX2489]

is there a template on how to write the information, like the information above, for a planet system, im new at this and i dont really know how to do it. Any help would be greatly appreciated. Thanks


Tom

[marc]

Have a look at solarsys.ssc which is in celestia's data directory. It defines our solarsystem in that same format.