E66 -- Theoria motuum planetarum et cometarum

(Theory of the motions of planets and comets)


Originally published with the title: Theoria motuum planetarum et cometarum. Continens methodum facilem ex aliquot observationibus orbitas cum planetarum tum cometarum determinandi. Una cum calculo, quo cometae, qui annis 1680. et 1681. itemque ejus, qui nuper est visus, motus verus investigatur.

Summary:

This is the first edition of Euler's first book on astronomy. Euler introduces new methods of investigating planetary perturbations.

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