Watch a lunar eclipse

Watch a lunar eclipse

What happens during a lunar eclipse?

This video from NASA explains what happens during a lunar eclipse:

A lunar eclipse is the shadow of the Earth on the moon. If you stand in front of a light, you block the light and cast a shadow in front of you. When Earth lines up directly between the sun and the moon it blocks the sun's rays and casts a shadow on the moon. As the moon moves deeper into Earth's shadow, the moon changes colour from gray to an orange or deep shade of red.

Lunar eclipse

Lunar eclipse

The moon changes colour because sunlight is can still pass through Earth's atmosphere indirectly. This light casts a glow on the moon. Our atmosphere filters out most of the blue coloured light, leaving red and orange light.

Unlike solar eclipses, lunar eclipses are perfectly safe to view without any special glasses or equipment. All you need is your own two eyes! Make sure you never look directly at the sun.

Main image (cc) Simon Barnes

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