Circumstellar disk

Okay kiddo, imagine you have a room full of toys and you want to play with them. But imagine you have no box or container to keep them in. They would be all over the place and you would probably have a hard time finding the toy you want to play with, right? So mommy gives you a big box to keep your toys organized. Now you can put all your toys in the box and it's much easier to keep them organized and find the toy you want to play with.

Well, the same thing happens in space with stars. When a star is born, it has a lot of material and gas around it. Just like your toys in the room, this material and gas can be all over the place and hard to keep organized. But nature has a way to keep things organized in space too! It's called a circumstellar disk.

A circumstellar disk is like a big box around a star. The material and gas around the star gets pulled into the disk thanks to gravity. The disk is like a flat surface, and it has a center where the star is located. All the material inside the disk is rotating around the star just like how Earth rotates around the sun. This means that everything in the disk is moving in the same direction, and this helps keep things organized.

As the material in the disk rotates around the star, it starts to clump together to form planetesimals. Think of them as little toys forming in your toy box! These planetesimals can come together to form planets, just like how you might group your toy cars together in one part of the box.

So, a circumstellar disk is like a big box in space that helps keep the material around a star organized. This organization helps form planets, just like how grouping your toys together in the box can make it easier to find and play with them.