World Generation Plugin for Fuzion
Step 1: Stellar Data
Step 1b: Number of Stars
First, determine the number of stars in the star system.
Orbital Period = P = (d3/(M1 + M2))½
Step 1b: Star Size
For each star, roll 3d6 to determine the its size.
Step 1c: Spectral Class
This one-letter designation describes the colour and temperature of the star.
The common spectral classes are, from hottest to coolest: O, B, A, F, G, K, M. (easily remembered via the mnemonic "Oh, Be A Fine Girl, Kiss Me").
Class O, B, and A stars are the hottest, and are white or blue-white in colour. Class F and G are yellow and medium temperature; these are the most likely to have Earthlike planets. K and M are red and only a few thousand degrees cool.
Several other stellar classes are very rare: Class W, or Wolf-Rayet stars, are white-hot, more than twice the temperature of O stars. R, N, and S are giant stars which are so cool that they cannot support Earth-type life in their vicinity. R and N -- nowadays classed together as C -- are dim red, and S is an even dimmer reddish-brown.
Spectral classes are further broken down into ten numerical subclasses, 0 (hot) through 9 (cool). Thus our sun, a G2 star, is hotter than a G5 and cooler than a G0, which in turn is slightly cooler than an F9 or F8.
For each star in the system, determine the stellar class.
Copyright © 1999 by B.C. Holmes. Last updated November 6th, 1999.
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