home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
BUG 1
/
BUGCD1996_0708.ISO
/
pc
/
aplic
/
mercury
/
planet.eka
< prev
next >
Wrap
Text File
|
1992-11-03
|
376b
|
18 lines
; equations for planet design
; used by Jerry Pournelle for science fiction books
; i illuminence, L luminosity, R distance to earth,
; M stellar mass, P period, all relative to sol/earth
; basic equations
i = L / R^2
M P^2 = R^3
; values for a particular story
i = 0.97
L = 0.93
M = 1.2
; exclude extreme values of P, R
1e-10 < P < 1e10
1e-10 < R < 1e10