How long did the great plume expedition last

Several weeks? I'm not sure of the exact amount of time.

On their expedition, which lasted several weeks, the young men and Chevalier's party killed 1,397 birds of 36 species.

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.