Galileo Galilei (1564-1642)
Sidereus Nuncius, Venice, 1610
Florence, Biblioteca Nazionale Centrale, Post. 110, pp. 8-9

This is the work that apprised the world of the extraordinary celestial discoveries Galileo was able to make thanks to the telescope. He dedicated his most extraordinary discovery, Jupiter's four moons, to the House of Medici by calling them "medicea siderea" or "Medici stars". The small book also caused a sensation on account of the engravings it contained showing the Moon's uneven surface.