E142 -- Sur l'atmosphere de la Lune prouvée par la derniere eclipse annulaire du Soleil.

(On the atmosphere of the moon as proved by the last ringed eclipse of the sun)

(based on Eric J. Aiton's introduction (written in English) to Opera Omnia Series 2, Volume 31)
Euler's goal in this paper is to show that certain phenomena that resulted from the eclipse of July 25, 1748 are evidence that the moon has an atmosphere that is almost 200 times less dense than that of the earth.

According to C. G. J. Jacobi, a Latin treatise with the title: “De atmosphaera lunae ex eclipsi solis evicta” was presented to the Berlin Academy on December 5, 1748.

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