Amalthea: Jupiter's Bumpy Little Moon!

Amalthea is a moon, which means it's a space rock that goes around a planet. Amalthea's planet is Jupiter, the biggest planet in our solar system! It's not a round ball like our Moon. Instead, it looks more like a bumpy potato or a giant, misshapen pebble floating in space. It's one of Jupiter's inner moons, meaning it's closer to Jupiter than many of its other moons.

Amalthea is pretty small compared to planets. If you could stretch it out, it would be about 250 kilometers (155 miles) long. That's not even as long as the state of Florida! To imagine its width, think about how wide a big city might be. It's much, much smaller than Earth, which has a diameter of about 12,742 kilometers (7,918 miles).

Amalthea zips around Jupiter super fast! It takes Amalthea only about 12 hours to make one full trip around its giant planet. That's faster than you can go to school and back home! Because it's so close to Jupiter, it also gets pulled around by Jupiter's strong gravity. This means it's always showing the same side to the giant planet, just like our Moon does with Earth.

Amalthea is made of rocky material. What's really cool is that it's covered in reddish dust! Scientists think this red color might come from something called 'volcanic ice' from another moon called Io. Imagine a tiny moon being dusted by another moon's volcanoes – that's Amalthea! It's a very dark place, with very little light reflecting off it.