To the moon and back in ninety days : a thrilling narrative of blended science and adventure (1922)
Brown, John Young, 1858-1921, Lunar Publishing Company. pbl · Providence, Kentucky : Lunar Publishing Company · leaf 107
intervening body counteracteach other and establish the point of equilibrium at C.Now if C be brought twice as near B, the force ofBs attraction upon it becomes four times as great asbefore, four being the square of two. Bs inherent at-tractive capacity, which depends solely upon its mass,or…
Astronomy
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