1. Jupiter and Saturn
... the sun. Incredible! Being such a large and bright planet, Jupiter was able to be seen and was known to exist even back in the prehistoric times. Galileo, living from 1564-1642, discovered that Jupiter had four large moons: Io, Europa, Ganymede and Callisto. This was discovered in 1610. We now know today that ... Jupiter has thirty-nine known satellites, the most in the solar system. With the discovery of the four large moons by Galileo, it showed that there was a center of motion not apparently centered on the Earth, which was the believed idea of the time. This theory ended up ... the...
- Word Count: 846
- Approx Pages: 3
- Grade Level: High School