39.9 EUR
336 pp. (English). Second-hand. Condition: 4+.
In this edition the principal works of K.E.Tsiolkovsky dealing with rocketry and the theory of interplanetary communications were published. These writings had brought him the priority as the founder of theoretical cosmonautics. The article by academician S.P.Korolyov "On the Practical Significance of... (More)
Rare book.
432 pp. (English). Second-hand book. The state is rated 8.85 (out of 10).
The way in which knowledge progresses, and especially our scientific knowledge, is by unjustified (and unjustifiable) anticipations, by guesses, by tentative solutions to our problems, by conjectures. These conjectures are controlled by criticism: that is, by attempted refutations, which include severely... (More) |