Synopsis
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? Where to watch TED Ed: Why is the Milky Way a Spiral? movie free? Click the "Watch Now" button above to stream the film TED Ed: Why is the Milky Way a Spiral? in HD for free on SFlix.
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