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Human Orrery

Let's model the Solar System with our bodies! In a large space (like the hall or playground), choose one person to be the 'Sun' (standing still), one person to be the 'Earth', and one person to be the 'Moon'.

  • The 'Earth' must walk slowly in a big circle (orbit) around the 'Sun'.
  • While orbiting, the 'Earth' must also spin (rotate) on the spot.
  • The 'Moon' must walk in a small circle around the spinning, orbiting 'Earth'. This shows how the Earth, Moon, and Sun all move relative to each other.