Voyager 2 flew by the Jupiter system on July 9, 1979, and discovered a host of surprises — including a series of cracks on the surface of one Jupiter's moons, Europa.The scenes in the spacecraft ...

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

Voyager 1 captured this image of Jupiter and its moon Ganymede (bottom left) when it was just over a month away from its closest approach to the planet in 1979.

Voyager 1 did a lot of work on Saturn and especially Titan, using a remote sensing technique called radio science occultation that measures a moon's physical characteristics.

Scientists selected this path so they could measure a hypothesized electrical circuit connecting Jupiter and its moon Io, and it took Voyager 1 deep into the most hazardous radiation belts in the ...

A composite of Jupiter and its four Galilean moons, taken by the Voyager I space probe. Io (upper right) is closest to Jupiter, followed by Europa, Ganymede, and Callisto (lower left).

By the time Voyager cruised by in 1979, the giant was up to 13 moons. Voyager added three to the count: Metis, ... that some of Jupiter’s moons have been “discovered” more than once.

Voyager 2 entered Jupiter's orbit as Voyager 1 was on its way out and took an additional 14,000 photos before completing its Jupiter encounter in August 1979. That was 45 years ago.

From Jupiter’s cratered Callisto and volcanic Io to Saturn’s cloudy Titan to plumes erupting on Triton, a moon of Neptune. The Jupiter and Saturn systems have since been explored in greater detail by ...

But the moon’s wild volcanic activity wasn’t detected until Voyager 1 flew by Jupiter and its moons in 1979, revealing Io’s dynamic surface that resembled a pepperoni pizza, Bolton said.

Jupiter’s four largest moons were discovered by Galileo in 1610 and named after mythological lovers of Zeus. NASA’s Juno spacecraft arrived at Jupiter on July 4. Callisto Large craters are ...

Each of Jupiter's other 91 official moons has a diameter greater than 0.6 mile (1 kilometer) — but only 57 have names, and just eight have regular, nearly round orbits.