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.

Jupiter is the largest planet in the solar system and has, as of 2023, 95 known moons. The four largest moons of Jupiter—Io, Callisto, Ganymede, and Europa—were the first objects in the solar system discovered with a telescope.

The Galilean moons (/ ˌɡælɪˈleɪ.ən /), [1] or Galilean satellites, are the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto.

2025年1月29日 · Jupiter's four largest moons were the first moons discovered beyond Earth. They are called the Galilean satellites after Italian astronomer Galileo Galilei, who is credited with their discovery in 1610.

2022年8月29日 · The four largest moons of Jupiter were discovered in 1610 by Italian astronomer Galileo Galilei – that’s why they are also called the Galilean moons. At first, he couldn’t separate Io and Europa and saw three objects instead of four.

5 天之前 · The largest moons of Jupiter are the Galilean moons: Io, Europa, Ganymede, and Callisto. Ganymede is the largest moon in the solar system, surpassing Mercury in size with a diameter of 3,273 miles (5,262 kilometers). ... Galileo Galilei discovered Jupiter’s four moons in 1610 using a telescope. Simon Marius claimed to have discovered the ...

2023年6月8日 · Jupiter's four largest moons are known as the Galilean moons. This composite image shows from left to right, Io, Europa, Ganymede, and Callisto (Image credit: NASA/JPL/DLR)

2023年9月4日 · Galilean Moons: Jupiter’s four largest moons—Io, Europa, Ganymede, and Callisto—are collectively known as the Galilean moons, named after their discoverer, Galileo Galilei. Io’s Volcanoes: Io, the innermost Galilean moon, is the most volcanically active body in the solar system, with over 400 active volcanoes.

2024年11月6日 · All you need is a good pair of binoculars (or a telescope) to see the four largest moons of the biggest planet in our solar system, Jupiter. Three of the four moons are bigger than Earth’s moon....

Four ‘Galilean Moons’ (Ganymede, Callisto, Io, and Europa) are the largest moons of Jupiter. Planet Jupiter has 4 inner moons ( Metis, Adrastea, Amalthea, and Thebe), whose orbits are very close to Jupiter.