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Binary star systems question.
Posted: 05.11.2003, 00:46
by 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
Posted: 05.11.2003, 01:04
by 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
Posted: 05.11.2003, 01:54
by 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
Posted: 05.11.2003, 08:40
by marc
Have a look at solarsys.ssc which is in celestia's data directory. It defines our solarsystem in that same format.