It will be blood red from all of Earth's sunrises and sunsets reflected on to the Moon's surface.
In the year's only full lunar eclipse, Earth will come between the Sun and the Moon.
Falling fully into Earth's shadow, the Moon will slowly darken before turning dusky red.
The only sunlight reaching the Moon during the full eclipse will be passing through the Earth's atmosphere.
This light will be blood red, from all Earth's sunrises and sunsets reflected on to the Moon's surface, explains Dr Gregory Brown, astronomer at the Royal Observatory in Greenwich, London
"You'll actually be seeing every sunrise and every sunset occurring around the Earth at once. All of that light will be projected on to the Moon," he told BBC News.
See the full story on BBC News here:
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