STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY STEPHEN & DONNA O'MEARA / SCIENCE PHOTO LIBRARY
A total lunar eclipse occurs when the full moon passes through the dark umbra of the Earth's shadow. This image shows the fully eclipsed moon at mid-totality. The colours are a result of sunlight being refracted into the Earth's shadow by the Earth's atmosphere. The colour and brightness of the moon in eclipse depends on how much light is refracted into the shadow by the Earth's atmosphere.
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