The „special basic model" discussed in Chapters 1 to 7 can also be applied to systems that are not similar to the sun. Equation 1.4.1 for solar-like star systems can be generalized so that it applies to any number of stars of a spectral class in the galaxy.

Related to all star systems A in our galaxy, the number N_X of a set of star systems results with:

F_X is the probability of the occurrence of a set of stars that have a certain property.
A natural order of the stars is given by the system of spectral classes. [1] The spectral class of the G stars was already used in the special basic model.
Equation 8.1.1 therefore applies to the star set of any spectral class. (see also chapter 12.1) This means that the concept derived so far can be applied to all star sets for which observation data are available.