Earth–Sun–Moon System

Connect observable patterns on Earth and the Moon to rotation, revolution, gravity, and sunlight.

Use this browser-based activity for a review station, partner practice, or a projected class challenge.

Arcade Game

Moon Mission Run

Students cross lunar terrain and answer 20 questions selected from a 50-question Earth and space science bank. Questions include gravity, Earth and Moon motions, Moon phases, seasons, tides, eclipses, and other basic astronomy.

Play Moon Mission Run

Teaching the Earth–Sun–Moon system

Use these compact points to frame the game, clarify vocabulary, or guide a short debrief.

Rotation and revolution

Earth rotates on its axis while Earth revolves around the Sun and the Moon revolves around Earth; each motion occurs on a different timescale.

Moon phases and sunlight

Moon phases occur because observers on Earth see changing portions of the Moon’s sunlit half as the Moon orbits Earth.

Eclipses and alignment

Solar and lunar eclipses require particular alignments of the Sun, Earth, and Moon; they do not happen during every orbit.

Gravity, seasons, and tides

Gravity keeps objects in orbit and the Moon strongly influences tides. Earth’s axial tilt—not changing distance from the Sun—drives the seasons.

Try This in Class

Before each Moon phase, eclipse, or season question, have students sketch the positions or tilt they predict. After the answer, ask them to revise the diagram and label where the light comes from.

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