The Hollow World of Edmond Halley

  title={The Hollow World of Edmond Halley},
  author={N. Kollerstrom},
  journal={Journal for the History of Astronomy},
  pages={185 - 192}
  • N. Kollerstrom
  • Published 1992
  • Engineering
  • Journal for the History of Astronomy
Three hundred years ago in 1692, an article by Edmond Halley proposed that the Earth was hollow.' Its theory was based on the value of lunar relative density given by Isaac Newton. The first edition of Newton's Principia (1687) found that " ... the mass of the Moon will be to the mass of the Earth as 1 to 26, approximately", citing the relative densities of Moon to Earth as 9 to 5.2 This value of lunar relative mass was in excess by a factor of three, as the true mass ratio is 1:81. Arguably… Expand
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