Galileo Galilei was the most brilliant astronomer of his time, armed with a telescope and an obsession with truth. In the early 1600s, he confirmed what others had only theorized: Earth revolved ...

Astronomy enthusiasts across the globe are breaking out their telescopes this weekend (October 22-24) in a coordinated effort to help hundreds of thousands of people experience their own “Galileo ...

Few figures shine as brightly as Galileo Galilei, an Italian philosopher whose contributions to astronomy revolutionized the understanding of the stars. "Galileo Galilei (1564–1642) has always played ...

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

On Jan. 7, 1610, Galileo Galilei turned his self-built telescope, which he had recently made improvements to, towards Jupiter. There he noticed three spots of light. Though he first concluded they ...