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A total lunar eclipse tomorrow morning, when the Earth casts a shadow onto the moon, is set to the turn the sky a deep red.
The full moon will start to pass through Earth's shadow at 6.32am on the longest day of the year, the Winter Solstice on December 21.
Unusually, this eclipse will include a brief period when both the sun and eclipsed moon are above the horizon and precisely opposite each other in the sky.
The partial eclipse begins when the moon first enters the dark inner, umbral part of the Earth's shadow, and will become a total eclipse at 7.40am.
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