The prerequisite
for a space-moving civilization is:
From
a developmental point of view, only the highest level of
civilization 8 has interstellar space travel. Therefore,
the probability of finding such a species is:
The
probability of a habitable "Earth 2" in
solar-like star systems, in our galaxy, with a
technological civilization operating interstellar space
travel, is then by definition 6.4.2: |
A new version of the book
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176 Sites 84 coloured Illustrations 9 Tables Production und Publishing: Books on Demand GmbH, Norderstedt ISBN 9-783-7528-5524-1 Price: 22 Euro |
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