ELI5: Explain Like I'm 5

Messier object

Okay kiddo, have you ever looked up at the night sky and seen stars twinkle? Well, sometimes there are objects up there that look like fuzzy blobs instead of twinkling stars, and we call these Messier Objects.

But why do they look fuzzy? Well, you see, Messier Objects are not just very far away stars. They are actually other things in space like nebulas, galaxies or star clusters. They are made up of gas, dust, and lots of stars all packed together.

Now, a man named Charles Messier made a list of all the objects that looked like fuzzy blobs so that astronomers would know that they were not stars. The list was called the Messier catalog.

Scientists like to study Messier Objects because they tell us a lot about the universe and how it was formed. So, next time you see a fuzzy blob in the sky, you might have spotted a Messier Object!