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.

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 ...

Catch two transits of Io, spot sparkling star clusters, and view Mars at aphelion while the April Full Moon lights the sky ...

Sunrise: 6:55 A.M. Sunset: 7:18 P.M. Moonrise: 5:01 A.M. Moonset: 2:55 P.M. We’re back at Jupiter in Taurus this evening to watch the innermost Galilean moon, Io, now transit the disk alongside ...

These pinpricks of light are actually Jupiter's four largest moons, now known as the Galilean moons: Io, Europa, Ganymede, and Callisto. Many of these celestial orbs are as remarkable as Jupiter ...

Io, the innermost of Jupiter’s four Galilean moons, is the most volcanic world in the solar system, giving it a dynamic mix of yellows, reds, and browns. Hyperion is one of the strangest moons ...

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 ...

Io, Europa, Ganymede, and Callisto (arranged in this artificial montage from top to bottom). Now astronomers count 39. Yet the objects of greatest interest continue to be the Galilean moons.

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point ...

What can a sample return mission from Jupiter's volcanic moon, Io, teach scientists about planetary and satellite (moon) ...

Are you curious about our nearest stellar neighbor? Have you ever wanted to see the night sky from a Galilean moon? Visit the Lycoming College campus to unravel the mysteries of the universe in the ...