Ok kiddo, let's talk about Tyche!
So, some people think that there might be a big planet out there in space that we don't know about yet. They call this planet "Tyche". It's called a "hypothetical" planet because we don't have any definite proof that it exists yet, but some scientists think it might be out there.
Some people think that Tyche is a really, really big planet - even bigger than Jupiter, the biggest planet in our own solar system. It might be so big that it has its own moon, or even a few moons.
But why do scientists think that Tyche might exist? Well, they have noticed that some things in space seem to be affected by something big and far away. It's like they can see the effects of something, but they can't see the thing itself. That's where the idea of Tyche comes in - some scientists think that maybe there's a big planet out there that's causing these effects.
But, it's important to remember that we don't know for sure if Tyche exists or not. It's just a theory that some scientists have come up with. If it does exist, though, it would be really exciting to learn more about it!