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

And half of the 50 years, NASA Voyager 1 has spent billions of miles traveling into interstellar space. In October, it went ...

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.

This gas giant has some really unique features that make it stand out. If you’re curious about space, learning a few things ...

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.

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.

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 ...

NASA launched two 12-inch gold-plated copper disks filled with the sounds of children's laughter, heartbeats, and bird calls.

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.

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.

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.