Research into Jupiter’s moons shows Io and Europa did not evolve apart but formed with opposite compositions from the ...

With the moon out of the way on Jan. 18, bright Jupiter and Saturn become stand-outs in the January night sky.

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor ...

On a clear night, if you point a telescope at the sky, you might spot a line of bright, star-like lights. What you’re actually seeing is Jupiter and its four Galilean moons – Ganymede, Callisto, Io ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

As 2026 unfolds, a rare celestial guest is preparing for its final, dramatic act before vanishing into the deep dark of space. The interstellar comet known as 3I/ATLAS, having already skirted past ...