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.

Tonight, skywatchers will be treated to a stunning spectacle as the Moon and Jupiter align in the night sky. Just hours after reaching its third-quarter phase, the Moon will rise beside the mighty ...

The ocean on Ganymede may have more water than all the water on Earth. In this artist’s concept, the moon Ganymede orbits the giant planet Jupiter. NASA’s Hubble Space Telescope observed aurorae on ...

Underground extraterrestrial oceans are one of the astronomical community’s staple points of speculation; from the lakes beneath Jupiter’s moon Europa, to those beneath Saturn’s Enceladus, the latest ...

New data from the orbiter has unveiled some of the treacherous conditions of not only Jupiter, but its moon Io, the most volcanic body in the solar system. The findings, which come after Juno has ...