Researchers now appreciate that gas planets are more complex than first thought. New findings have implications for our ...

NASA's Juno spacecraft made a close flyby of Jupiter moon lo. See an animation of the images the probe captured created by ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

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 ...

Galileo’s repeated observations over several nights and realized they were moons orbiting the gas giant. And thus, Io, Europa and Ganymede became known as the Galilean moons of Jupiter.

Galileo, who had observed Jupiter’s four major moons (now also called as the Galilean moons) on January 7, 1610 (Gregorian calendar), had already published Sidereus Nuncius (The Sidereal ...

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 ...

Jupiter’s largest moons, known as the Galilean moons, are known not only for their size but for their unique features. Discovered in 1610 by Galileo Galilei, these moons—Ganymede, Callisto ...

ISS then moves to the southeast where it slips into the Earth’s shadow 15 degrees above the horizon at 9:37 p.m. Monday: The Galilean ... all four moons are on the same side of Jupiter.

Astronomers continue to make new discoveries about the Galilean moons of Jupiter, a thrilling environment of ice and fire. In a pair of studies published this month, the James Webb Space Telescope ...

Europa is the smallest of Jupiter's four Galilean moons but it is seen by most experts ... is likely in contact with sand/rock according to models,' Professor Coates told MailOnline, 'whereas ...