system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's the difference between a barrel roll and an aileron roll?

I fell down a Wikipedia rabbit hole and I'm having trouble differentiating between the two types of aerial maneuvers. Wasn't sure how to tag this post, so I just chose physics, I hope that's okay.
gpt
Imagine a straight line through the aircraft from nose to tail. 

During an aileron roll this line doesn’t move and the aircraft rotates about the imaginary line. 

During a barrel roll the imaginary line moves in a circle while the aircraft rotates about the center of that circle (similar to how the moon orbits the earth).