It’s the name of a small celestial body that crossed our solar system a few years ago.

The Haleakala Observatory, in Hawaii, was the first to spot it in October 2017.

Astronomers gave it a Hawaiian name, Oumuamua, which means “messenger”.

So, what’s all the fuss about?

It’s the first time that an object from somewhere else has been observed in our solar system.

Scientists were surprised by its long shape – like a baguette.