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 ...

The four biggest moons of Jupiter aren't just blurry smudges in Galileo's telescope anymore. The Italian astronomer Galileo Galilei discovered Ganymede, Callisto, Europa and Io back in 1610, which ...

I am Galileo Galilei, a scientist from Italy and I am the man who is making some exciting discoveries around force ... How To' film on creating your own telescope. Bye-ee! This vlog style film ...

Well, any of us who has ever looked through a telescope ... Galileo had not only learned of the new device but was well on his way to improving its design. In his workshop in Padua, Italy, he ...