Galileo Galilei Made some incredible observations of the moon and was a real pioneer in calculating the height of some of the moon's geological features. In 1610 he turned the world of planetary astronomy on its head. He described the phases of Venus, came agonisingly close to discovering the true nature of Saturn's rings, and studied what became to be his namesake system, the four Galilean moons of Jupiter.Let's take a look.Follow Cosmic Coffee Time on Twittertwitter.com/CosmicCoffTimeYou can request a topic for the show! Or even just say hi!We'd love to hear from you.Email us!cosmiccoffeetime@gmail.com