Astronomy of To-Day

Astronomy of To-Day

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"[...]would weigh only about one-sixth of what it did on the terrestrial surface. It will therefore be seen that if a body of given mass were to be placed upon planet after planet in turn, its weight would regularly alter according to the force of gravity at each planet's surface. Gravitation is indeed one of the greatest mysteries of nature. What it is, the means by which it acts, or why such a force should exist at all, are questions to which so far we have not had even the merest hint of an answer. Its action across space appears to be instantaneous. The intensity of gravitation is said in mathematical parlance "to vary inversely with the square of the distance." This means that at twice the distance[...]."show more

Product details

  • Paperback | 318 pages
  • 152.4 x 228.6 x 14.73mm | 449.05g
  • Createspace Independent Publishing Platform
  • United States
  • English
  • black & white illustrations
  • 1507699123
  • 9781507699126