Sidereus Nuncius

Published on March 13, 1610, Sidereus Nuncius is the first scientific work based on observations made through a telescope.

It reports Galileo's findings on the imperfect and mountainous Moon, hundreds of stars not visible to the naked eye, and the discovery of four moons orbiting Jupiter, later known as the Galilean moons.

This work challenged the prevailing Ptolemaic and Aristotelian views of the cosmos and marked a significant milestone in the history of astronomy.