ELI5: Explain Like I'm 5

Elliptical galaxy

An elliptical galaxy is a big group of stars that looks kind of like a big, squashed ball. The stars in an elliptical galaxy are all moving in different directions, like a group of people in a big crowd.

Think of it like a group of balloons in a big room. The balloons are all packed together, but they're all in different places and moving around. That's kind of like an elliptical galaxy, where all the stars are close together but moving in different directions.

Elliptical galaxies can be very big, with millions or even billions of stars. They're also some of the oldest galaxies in the universe. Scientists think that many galaxies, including our own Milky Way, started out as elliptical galaxies before they changed into the spiral shape we see today.