He turned it toward the heavens and published what he learned in his first book, Sidereus Nuncius (The Starry Messenger), introducing four moons of Jupiter to his generation.
Ta suunas selle taeva poole ja avaldas saadud teadmised oma esimeses raamatus Sidereus Nuncius (Tähtedelt sõnumi tooja), tutvustades oma põlvkonnale Jupiteri nelja kuud.