The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts (1915)
Collins, A. Frederick (Archie Frederick), 1869- · New York, D. Appleton and company · leaf 77
might expect them to do. In the beginning of things the planets were a part of the 58 THE BOOK OF THE STARS Sun, as we shall see further on, and when they were thrown offby him they spun round their own axes, and at the same timethey shot out into space just like a ball spins round its axis asit… … tangent Fig. 64.—Boy Throwing Stone to Illustrate Centrifugal Force. is, but how it acts is very well known, and you can find out foryourself by making the following experiment: Take a stone and tie one end of a string to it; now swingthe stone round in a circle; if the string should break, or…
Astronomy · Stars
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