Calculating the distance of the moon in Newton's day

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SUMMARY

The distance of the moon from Earth, approximately 380,000 km, was known during Newton's era, primarily through the works of ancient astronomers like Hipparchus. The methods of calculating this distance evolved significantly with advancements such as the invention of the telescope and the publication of Tycho Brahe's astronomical catalog. These tools allowed for more accurate measurements compared to earlier techniques. The discussion highlights the importance of historical astronomical methods in understanding celestial distances.

PREREQUISITES
  • Understanding of historical astronomy, particularly the contributions of Hipparchus and Tycho Brahe.
  • Familiarity with the principles of triangulation used in celestial measurements.
  • Knowledge of the impact of telescopic technology on astronomical observations.
  • Basic comprehension of the metric system, specifically kilometers as a unit of distance.
NEXT STEPS
  • Research the methods used by Hipparchus in his calculations of celestial distances.
  • Explore the advancements in astronomical measurement techniques following the invention of the telescope.
  • Study Tycho Brahe's astronomical catalog and its significance in improving distance measurements.
  • Investigate modern techniques for measuring distances in astronomy, such as radar ranging.
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Astronomy enthusiasts, historians of science, educators, and students interested in the evolution of astronomical measurement techniques and historical figures in astronomy.

bobsmith76
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my book says that the distance of the moon from the Earth was known in Newton's time but it doesn't say how they figured it out. it's 380,000 km. does anyone know how they knew it?
 
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Wikipedia has http://en.wikipedia.org/wiki/Hipparchus_On_Sizes_and_Distances" on the works of Hipparhus in this regard. Presumably measurements had improved somewhat over the intervening centuries (especially after the invention of the telescope and the publishing of Tycho's catalog).
 
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