Earth, Moon and Sun

Follow the light, change your viewpoint and put our Solar System in perspective.

Choose any question to begin.

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1. 1

   What causes day and night?

   Turn Earth and follow a place as it moves into sunlight and darkness.

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2. 2

   Why do the seasons change?

   Move a tilted Earth around the Sun and compare the two hemispheres.

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3. 3

   Why does the Moon appear to change shape?

   Move the Moon around Earth and compare the sunlit part visible from our planet.

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4. 4

   Why is there not an eclipse every month?

   Compare ordinary Moon phases with the special alignments that create eclipses.

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5. 5

   How big is our Solar System?

   Compare the planets’ sizes and distances using clearly labelled scales.

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Each discovery includes all five reading levels. Journey progress reflects the checkpoints answered on this browser.

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