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.

Loki Patera is 202 kilometres (126 mi) in diameter, covers 20,000 sq km (7,700 sq mi), and was the largest volcanic feature found on Io until these new observations revealed the hot spot in the south ...

They are more commonly referred to as the Galilean moons of Jupiter owing to the fact that they were discovered by Galileo. The four Galilean moons – Io, Europa, Ganymede and Callisto – are ...

The study of Jupiter's magnetosphere involves understanding the magnetic field generated by the planet, the interactions with its moons ... A new model of Jupiter's magnetic field, derived ...

Jupiter and its four planet-size moons, called the Galilean satellites, were photographed by Voyager 1 and assembled into this collage. They are not to scale but are in their relative positions.

Whereas our solar system's oldest moons, such as the inner moons of Jupiter and Saturn ... the Pluto-Charon system have come up with a model that could solve the mystery. Their research was ...

but the model showed that, barring a few moons, including Saturn's "Death Star" moon Mimas, these moon rings were stable — particularly Jupiter’s Iapetus. Even Earth's moon had a 95% chance of ...

A Family of Moons Galilean Moons: Jupiter boasts a vast system of moons, with four particularly large ones known as the Galilean moons (Io, Europa, Ganymede, and Callisto). These moons exhibit ...

Astronomers still refer to the four moons as the Galilean satellites in honor of their discoverer. In 1614, the German astronomer Johannes Kepler suggested naming the satellites after mythological ...

Galileo discovers Jupiter’s moons using a homemade telescope. When Galileo observed the planet, he found what he thought were four stars moving around it. However, the stars moved in a regular pattern ...