Answer : 1. "कॉपरनिकस"
Explanation :

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 discovered the model of the solar system and the path of the planets.