This research badly damaged Galileo's vision. NASA's Galileo mission to Jupiter is named after the Italian scientist because he discovered the four largest moons of Jupiter in 1609. Galileo's Sun Galileo made many drawings of the Sun. This animation shows a sequence of his sketches spanning the 24 day interval from June 2 to 26, 1612. The Sun ejected billions of tons of hot gas into interplanetary space this weekend.
Activity is on the rise as solar max approaches.
The most comprehensive site on the Internet for information about Galileo. Although his father wanted him to become a doctor, Galileo enjoyed mathematics and he became a scientist instead. Because of his discoveries in astronomy, Galileo grew to be very famous. Galileo made many discoveries. Among them were the moons of Jupiter, the phases of Venus, and mountains and craters on the Moon.