Steady Partner, Steady Seasons

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Gomez's Hamburger planetary nebula

ERN Item Type: 

  • Classroom Activities


Lunar and Planetary Institute (LPI)


Our Moon acts like training wheels for the Earth, allowing for a stable cycle of seasons. In part A, children ages 11 to 13 model how Earth's tilt creates the seasons. In part B, children model that if its tilt was not stabilized by the Moon, Earth's axis would slowly wobble betwen straight up and nearly on its side. The reulting seasonal extremes would be unfavorable for life. Allow one hour for this activity.

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