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World 2 · The Transit Dip · 10 min · PRO

Reading a planet’s size

From dip to radius

PRO · Exoplanet Hunter

World 2: The Transit Dip is part of PRO

The first world of Exoplanet Hunter is free. PRO opens the other 26 lessons in 6 worlds — simulations, quizzes and all.

  • The shadow of a planet
  • Period, orbit and Kepler
  • Tilt and luck
  • Is it really a planet?
  • Planets tug back
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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