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

The four largest moons of Jupiter—Io, Callisto, Ganymede, and Europa—were the first objects in the solar system discovered with a telescope. Galileo discovered them in 1610, and they are now called the Galilean satellites.

2023年12月26日 · Although Jupiter has at least 95 known moons, the four largest, known as the Galilean moons, are the best-known and arguably the most interesting. Io, Europa, Ganymede, and Callisto are collectively the Galilean moons. Their name comes from the Italian astronomer Galileo Galilei, who first observed these four moons through a telescope in 1610.

All 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.

2020年1月9日 · Astronomers still refer to the four moons as the Galilean satellites in honor of their discoverer. The German astronomer Johannes Kepler suggested naming the satellites after mythological figures associated with Jupiter, namely Io, Europa, Ganymede, and Callisto, but his idea didn’t catch on for more than 200 years.

four Galilean moons Io, Europa, Gany-mede, and Callisto, each with different characteristics. (In this image composite, Jupiter is not at the same scale as the satellites.) During one flyby of Io in 2000, the Galileo spacecraft photo-

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. German astronomer Simon Marius observed them around the same time, but is largely forgotten because he published his findings after Galileo.

Jupiter's 4 largest moons exhibit some of the most interesting geology in the solar system. They were discovered by Galileo Galilei and are known as the Galilean moons. Jupiter's largest moon, Ganymede, is larger than Mercury while the other three are larger than Pluto.

The Galilean moons are the four satellites of Jupiter found by Galileo Galilei: Io, Europa, Ganymede, and Callisto. They are by far the biggest of the many moons of Jupiter. Galileo Galilei found what came to be known as the Galilean moons around December 1609 or January 1610.

2023年4月13日 · Jupiter’s four largest and most well-studied moons were first discovered more than 400 years ago. And they still make for wonderful observational targets. The origins of Jupiter's Galilean...