September 8, 2009
If E to F is earth’s orbit and B is Jupiter, this dude used measurements w.r.t E, B, D and C to quantitatively estimate something for the first time. What?
p.s. D-C is guessable.
Late question is very late. Apologies folks, this question will be up for 24hrs from this point.
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Answer: Ole Rømer, quantitatively measuring the speed of light!