But that meant that Jupiter didn’t go around the Earth, as everyone had thought, and Earth wasn’t really the center of the universe. And today, we know so much about each Galilean moon that ...

67 moons orbit the great gas giant Jupiter; of these, the four largest are known as the Galilean moons, having been discovered by Galileo Galilei using his telescope in 1610. The four moons are Io ...

Jupiter's four best-known moons are the Galilean moons, discovered by Galileo Galilei in 1610. They are named Ganymede, Callisto, Io and Europa, after figures in Greek mythology associated with ...

The four largest – Io, Europa, Ganymede and Callisto – were discovered by Galileo Galilei in 1610 when he pointed the first astronomical telescope at the Moon, Venus and the planet Jupiter in quick ...

The next brightest after our own moon are the four Galilean satellites that orbit Jupiter. They range from magnitude 4.6 for Ganymede to 5.6 for Callisto. If they stood apart from the giant planet ...

High above the Moon, the Big Dipper appears to stand on the end of its bowl in the early evening, its handle sticking straight up into the sky. Jupiter's Galilean moons are also visible this ...

At the moment, Jupiter holds the record for the most known moons, beating out Saturn, which has 83. Unlike the four large "Galilean" moons, which have some dramatic features like volcanoes and ...

Most of us know four moons of Jupiter, called the Galilean moons because they were first discovered by Galileo in 1610. Named for figures closely associated with Jupiter from Greek mythology ...

For the Galilean moons, which presumably formed around the same time as Jupiter itself, the planet would have blazed like a star in the sky and overpowered the light emanating from the farther-off ...

New research shows auroras can also be seen on the Galilean moons of Jupiter: hypervolcanic Io, icy Europa, quirky Callisto and gigantic Ganymede. Auroras exist throughout the cosmos, but often in ...

fiery volcanic activity is seen erupting across Jupiter's moon, Io. Io is the third-largest of Jupiter's four Galilean moons and is the most volcanically active celestial body in our solar system ...

On the fiery Io, the innermost and third-largest of Jupiter’s four Galilean moons, Juno's observations have provided more insights about its incessant volcanic activity. It's a world home to ...