Re: [nbos] [AS2] Multiple-Star System Maps
"NBOS Support"
Thu Sep 6th, 2007

> When you're talking a multiple star system (even a close multiple)
> there are millions of miles between the stars involved. Distant
> multiples are much, much farther apart. They are far enough apart for
> planetary orbits of 15 million kilometers or so to fall BETWEEN stars.

To expand, this is how Astro determines the difference between a 'close
multiple' and a 'far multiple'. A far multiple system is one where the
stars are far enough apart that they dont really interfere with the
planetary orbits around the individual stars. In that case, its just a
standard 1 star system that happens to have a really bright neighbor.

A close multiple is one where the stars interfere with each other's
planetary orbits. While Astro doesnt _display_ more than one star at a
time in the orbital display, it does take close multiples into account
during system generation, and remove planets that otherwise could not be
in a stable orbit in the system. So you'll sometimes see a star with a
few planets very close in, and then a huge gap, and then a planet way out.
That huge gap is where the other star resides, and the planet thats way
out actually orbits both.

Multiple star systems are very, very complex to model (especially when you
have more than 3 stars, where it becomes very difficult to have a stable
set of orbits at all), and for the current version at least, outside the
scope of the program.


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