ELI5: Explain Like I'm 5

Interstellar dust

Okay kiddo, so you know how space is really really big, right? And in that space, there are tiny little things called particles. These particles come from different things like old stars and even other planets!

Now, these particles can start to stick together and form something called interstellar dust. It's like the dust you see on your shelves at home, but it's way way smaller!

This dust is important because it can tell us a lot about space. Scientists can study it to find out what stars and planets are made of. And sometimes, they even find the building blocks of life in this interstellar dust!

So even though it's just tiny little specks, interstellar dust can tell us big things about the universe. Cool, huh?