Movie

TED Ed: Why is the Milky Way a Spiral?

2024 0h 5m Released

Animation

Thirteen billion years ago, the gas and dust particles that eventually became our Milky Way were whizzing around in every direction. Despite the wild motion of its parts, the galaxy as a whole was rotating about an axis. So why did the Milky Way, like most galaxies, become flat, and not spherical like stars and planets?

Cast