Duration
60 minutes
Series Info
Season 9 Episode 1 of 33
Quick Summary
Experts analyse what happens when galaxies collide
About This Program
Experts analyse what happens when galaxies containing billions of stars collide and are left irrevocably changed
How the Universe Works broadcasts on Discovery History +1 at 1:00pm, Monday, 15 December 2025. (Subtitles)
Channel Numbers:
Sky HD782Sky274Virgin381