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World 6 · When Galaxies Collide · 11 min · PRO

Galaxies are not alone: groups and clusters

Most galaxies live in company

PRO · Cosmos: Big Bang to Now

World 6: When Galaxies Collide is part of PRO

The first world of Cosmos: Big Bang to Now is free. PRO opens the other 25 lessons in 6 worlds — simulations, quizzes and all.

  • Tidal tails and mergers
  • Milkomeda: the Milky Way meets Andromeda
  • Simulating the unthinkable: how N-body works
  • The first second to the first atoms
  • Dark ages, first stars, first galaxies
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

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← What could it be? And what we don't knowTidal tails and mergers →

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