On Jan 19, 9:13*pm, Bill Owen wrote:
Eric Chomko wrote:
The most interesting use of the Jovian moons was Roemer trying to
guess the speed
of light.http://en.wikipedia.org/wiki/R%C3%B8...on_of_the_spee...

Or the timing of eclipses as a method of determining longitude. *Jay
Lieske, before his retirement from JPL, found a veritable treasure trove
of 17th and 18th century eclipse observations, which helped constrain
the mean motion of the satellites before Galileo (the spacecraft) did it
far better.

After the antenna glitch on Galileo it is encouraging to read about
something it did well.


http://adsabs.harvard.edu/abs/1986A%...6AS...63..143L

-- Bill Owen