About this episode
Our galaxy is amazing, but it’s not the only one. Astronomers think there could be two trillion others out there. So, what’s up with those other galaxies? Are they just standing still, or do they orbit something? We asked astrophysicist Ian Hall to help us find the answer. Got a question that’s circling around in your brain? Send it to us at BrainsOn.org/contact , and we’ll help find a universally appealing answer! See omnystudio.com/listener for privacy information.