Look east around 4 a.m. local time, just before dawn, to see the slender form of the crescent moon climb above the horizon.

Not a huge amount is known about them, but we do know that they are both small moons on a retrograde orbit around the planet, meaning that they are moving around Jupiter in the opposite direction to ...

Juno also snapped pictures of Jupiter's potato-shaped inner moon, named Amalthea. With a radius of only 52 miles (84 kilometers), Amalthea is significantly smaller than Earth 's moon.

Instead of relying on uncertain estimates, like how fast gas was collected by early planets, they turned to two of Jupiter's smallest and often overlooked moons: Amalthea and Thebe.

A massive NASA spacecraft is ready to set sail for Jupiter and its moon Europa. The craft, named Europa Clipper, will determine if conditions there could support life.

Europa Clipper will face a challenge once it reaches the planet's moon — exposure to radiation, since the moon is within Jupiter’s magnetic field. To combat this, the spacecraft's electronics ...

That extended mission, which is slated to end in September 2025, also extends to Jupiter's rings and many moons. Juno’s trajectory passes by Io every other orbit, flying over the same part of ...