Moons of Jupiter - Wikipedia
https://en.wikipedia.org/wiki/Moons_of_JupiterThe Galilean moons of Jupiter (Io, Europa, Ganymede, and Callisto) were named by Simon Marius soon after their discovery in 1610. However, these names fell out of favor until the 20th century. The astronomical literature instead simply referred to "Jupiter I", "Jupiter II", etc., or "the first satellite of Jupiter", … See more
Jupiter | NASA
https://www.nasa.gov/jupiterWebJupiter: The Basics. Namesake: King of the Roman gods. Date of Discovery: Known to the ancients. Orbit: Approximately 484 million miles from the sun (five times as far from the …
Moons of Jupiter - Wikipedia
en.wikipedia.org › wiki › Moons_of_JupiterAll together, Jupiter's moons form a satellite system called the Jovian system. The most massive of the moons are the four Galilean moons : Io , Europa , Ganymede , and Callisto , which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were the first objects found to orbit a body that was neither Earth nor the Sun .