Re: [nbos] [AS] Binary Star Systems
"Mike Oliver"
Sat Dec 9th, 2006
I, too, enjoyed Traveller 2,300 (still have it) but now game under my
own system, "Spacefarer". It is far less dependent on tables and dice
rolling than most commercial systems. I very much "wing" my gaming
sessions and, if somebody scores a hit on an opponent with a "modern"
(1900 - whenever) weapon, they cause a light wound (minor impedence of
normal activities), a serious wound (major impedence of normal
activities needing substantial medical facilities) or death

The science, however, especially astronomical, is as sound as I can make

If you want the MegaTraveller orbital generation rules I can tell you
what they are with the hope that somebody doesn't get upset about
copyright and try to sue me.



-----Original Message-----
[] On Behalf Of Daniel Williamson
Sent: 8 December 2006 13:33
Subject: Re: [nbos] [AS] Binary Star Systems


It can get very complicated very quickly. I don't have MegaTraveller.
For my gaming purposes I've simplified it to the following rule: stable
orbits are 1/3 less than the separation and 3 times the separation.
Which I think came from another GDW product, 2300AD. Which has been
highly influential on my SciFi gaming. Though right now I'm mostly
playing Battlelords of the 23rd Century, which is, as the name implies,
considerably more like Space Opera than it is like Hard Science.



----- Original Message ----
From: Mike Oliver <>
Sent: Friday, December 8, 2006 5:13:20 AM
Subject: Re: [nbos] [AS] Binary Star Systems

When modelling multiple systems, one needs to be careful about planets
passing between close doubles (etc.) proto-planetary materials could
well have problems coagulating with such gravitational stresses.
MegaTraveller has a neat system for determining what orbits would not
contain planets under such circumstances. I don't know how accurate it
might be (does anyone?) but it seems reasonable to me.

Also, to get some ideas about the effects on habitable worlds orbiting
such systems, Brian Aldis' "Heliconia" trilogy is invaluable and a good
read to boot.



-----Original Message-----
[] On Behalf Of NBOS Support
Sent: 8 December 2006 08:59
Subject: Re: [nbos] [AS] Binary Star Systems

At 10:04 AM 12/7/2006, you wrote:
>Ideally I'd like to be able to use the system display to see the two
>orbiting each other and the planets each star individually and the
>gravitational center to get a grand overview of the system.

Thats something I'd like to do, but havent gotten a grip on the physics
it yet. A binary star system isnt a problem to model... but through in
third star and all bets are off :-)

>Also, I'd like to see AU used as the display orbital distance for top
>children at least. Or is there anyway that I can change it in the

I _was_ working on AU being an option in the system data fields setup as

part of the next minor update, but for some reason ended up not adding
in. The specific reason escapes me right now. But it is on my to-do
as quite a few people have asked for that.

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