As the innermost of Jupiter’s Galilean moons, Io offers a glimpse into some of the most extreme geologic phenomena in the solar system. Roughly the size of Earth’s Moon, Io’s surface is ...

but for the past few years it has been edging closer and making fly-bys of the large Galilean moons. On Dec. 30, 2023 and Feb. 3, 2024, Juno flew within 930 miles (1,500 kilometers) of Io.

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...

Io, a highly volcanic world, is the innermost Galilean moon of Jupiter. Got a pair of binoculars? Point them at Jupiter tonight—or any night during its bright opposition month—and you’ll ...

Using data collected by NASA's Juno spacecraft as it flew past Jupiter's highly volcanic moon Io in late 2023 and again in ...

NASA’s Juno spacecraft identifies over 40 enormous lava lakes on Io, shedding light on the extreme volcanism sculpting Jupiter’s moon.

Jupiter has four large moons – Io, Europa, Ganymede and Callisto – with diameters ... The four larger moons mentioned above, also known as the 'Galilean moons', account for 99.997 percent of the total ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however ...