The number of stars in our galaxy forms the basis
of all considerations made here. The set of G stars N_{s}
is a real subset of the set of all stars A in our galaxy.
The set of G stars that have planets N _{p}, is in turn a real subset
of the sun-like star systems N_{s}. The set of G stars that have planets
in the habitable zone N_{h}, is in turn a real subset of the sun-like
star systems with planets N_{p}.
Therefore:
This structure will continue and grow in all further considerations. The final equation that then results is equivalent to the structure of the classic Drake equation (Chapter 9.1) and the Seager equation (Chapter 10.1). This not only makes it possible to compare the models, but also to transform the Drake and Seager equations into the present model. Since the model is built up step by factor, this should contribute to a better understanding of the chain-like structure of the equations. |

176 sides, of them 64 in Color76 pictures 11 tables Production and publishing: Books on Demand GmbH, Norderstedt ISBN 9-783-7528-5524-1 Price: 22 Euro |
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