Callirrhoe (moon)

Imagine a tiny pebble compared to a giant beach ball! That's kind of like Callirrhoe and its planet, Jupiter. Callirrhoe is a moon, which means it's a natural thing that orbits a planet.

It's one of Jupiter's many moons, and it's super small. It's not round like our Moon; it's more like a lumpy potato! Callirrhoe is so small that if you held it, it might fit in your hand.

It's a rocky little world, unlike the giant gas planet Jupiter it circles.

Callirrhoe doesn't just hang out; it's always on the move! It travels around Jupiter in a very long, stretched-out path, kind of like an oval. It takes Callirrhoe a long, long time to make one full trip around Jupiter.

It's like running a marathon that lasts for almost 2 Earth years! This means that while you're celebrating your birthday year after year, Callirrhoe is still on its journey around its giant planet home.

This little moon is made of rock and ice. Think of it like a giant, frozen snowball mixed with dirt. Because it's so small and far away from the Sun, it's a very cold place. It doesn't have any air to breathe, like Earth does, and it's definitely too cold for any ice cream! Scientists know it's made of rock because of how it reflects sunlight and how it moves around Jupiter.

Callirrhoe wasn't found by just one person looking through a telescope. It was discovered in the year 2000 by a team of scientists using a big telescope called the Canada-France-Hawaii Telescope. They were looking for other things in space when they spotted this little moon. It's amazing that even though it's been there for billions of years, we only found out about it recently!