Ganymede, Io, Europa, and Callisto are called the...

Galileo Galilei discovered and named these four moons orbiting Jupiter in 1610.

6 of 9 people (66.67%) answered this question correctly.

0 of 65 questions completed

Dashboard

Your Coins: 0

World Coin Count: 1080

Product	Value	Cost
Life	Buy lives to help pass the quiz.	1 x 50 Coins