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Lunar eclipse HTML5


A lunar eclipse is produced when the moon passes partially or totally into the shadow of the Earth.

This happens when the Sun, the Earth and the Moon are almost aligned with the Earth between the Sun and the Moon. It is a frequent phenomenon observable by everyone situated in the night side of the Earth.

One must not get this phenomenon mixed up with a solar eclipse that also occurs when the three bodies are aligned, but the Moon is in this case between the Sun and the Earth. A solar eclipse is more rare and only seen by people situated near a small area of Earth (on the day side).

Click on the legend button in the navigation menu to display the information.

Click on the "orbits" buttons to simulate different trajectories.

Learning goals

  • Distinguish between a Lunar eclipse and a Solar eclipse.
  • Illustrate the different types of lunar eclipses
  • Define the dark and semi-light zones

Learn more

When the moon is behind the Earth in relation to the sun (full moon), it is possible to define three regions of light:

  • A large region where all of the Suns rays reach the moon. The moon is…

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