How to calculate the distance of the sun and the moon from earth, by understanding eclipses

Hipparchus, who used an eclipse of the Moon to deduce the precession of the equinoxes, used a total eclipse of the Sun - probably in 129 BC - to estimate how far the Moon was.

Authored by David P. Stern at From Stargazers to Starships, Added: 28 May 2007

http://www-istp.gsfc.nasa.gov/stargaze/Shipparc.htm

How to calculate the distance of the sun and the moon from earth, by understanding eclipses

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