Sedna (dwarf planet)

Sedna is a dwarf planet, which is like a smaller version of a planet. It's so far away from the Sun that it's super, super cold there! It's like living in a giant freezer. Sedna is also very, very red, kind of like a giant strawberry floating in space. Scientists think it's one of the reddest things in our solar system. It's a lonely traveler in the dark, cold outer reaches of space.

Sedna takes a really, really long time to go around the Sun. Imagine if your school year lasted for thousands of years! Sedna's trip takes about 10,500 Earth years. That's longer than all of human history! Because it's so far away, it gets very little sunlight. It's like being in a room with the lights almost completely off. This makes it one of the coldest places we know of.

Sedna is special because it's so far out and so mysterious. It lives in a part of space called the scattered disc. Scientists are still trying to figure out exactly where Sedna came from and what it's made of. It's like a giant puzzle piece from the very beginning of our solar system. Studying Sedna helps us understand how our solar system formed a long, long time ago.

Sedna is much smaller than Earth, but it's bigger than many moons. It's about one-third the size of Earth. Even though it's small, it has a very big mystery. Scientists found it in 2003. It was the most distant object ever seen in our solar system at that time. Its discovery made us realize there are still many amazing things to find out there in space!