He found out about the planets and how the earth and moon revolved.
Galileo Galilei
Galileo Galilei.
Galileo Galilei in 1610
Galileo Galilei
Galileo Galilei in 1625
Galileo discovered them. Their names are: Io, Callista, Europa and Ganymede. He discovered them in January 1610. == ==Galileo Galilei in 1610.
Callisto was discovered by Galileo Galilei on Jan 7, 1610
Galileo Galilei discovered Jupiter in 1610.
The Physicist, Galileo Galilei.
Saturn was discovered in Pisa, Italy by Galileo Galilei in 1610. Galileo also observed and discovered Saturn's Rings
Europa was discovered by Galileo Galilei in 1610.
Galileo Galilei discovered it on 7 January 1610.