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How the Universe Works

Alien Galaxies

Season 1 Episode 6
Galaxies, home to stars, planets and us, come in all shapes and sizes. Witnesses the evolution of galaxies; from clouds of cold gas floating in the voids of space 13 billion years ago, to the magnificent spirals that fill our night sky.
  • 43 min
  • TV-PG
  • Premiered 02/07/2011