Calypso: Saturn's Tiny Companion!

Calypso is a moon, which is like a little rock or ball of ice that goes around a big planet. Calypso is a moon of Saturn, the ringed planet! It's super small, only about 22 kilometers (14 miles) wide. That's like the length of about 22 football fields lined up! It's not round like our Moon; it's shaped more like a lumpy potato. It's made of ice and rock, just like many other moons in space.

Calypso has a very special job. It's a 'Trojan' moon! This means it shares its path around Saturn with a much bigger moon called Tethys.

Calypso hangs out in a special spot, always a little bit ahead of Tethys. It's like having a friend who always walks a little bit in front of you, but you both stay on the same road. This special spot is called a Lagrange point, a place where gravity helps keep them together.

Even though Calypso is small, it's always on the move! It zooms around Saturn really fast. It takes Calypso only about 45 hours to make one trip all the way around Saturn. That's less than two whole Earth days! Imagine going around your school playground in less than a day, many, many times. Calypso is always busy orbiting its giant planet home.

Calypso wasn't always known. Scientists found it in 1980 using telescopes. They were looking closely at Saturn and its other moons. It's amazing that even though it's so small, they were able to spot it! It shows how much we can learn by looking up at the stars with powerful tools.