Take a look out into the sky early tomorrow morning and you might see a moon that looks as if it's been dipped in red ink.
A partial lunar eclipse is happening in the early hours of Tuesday morning as the Earth travels between the sun and the moon and casts its shadow on the lunar body.
Its expected climax at about 6:20am would show the moon with a red tinge across part of its surface.
Director of Otago Museum, astronomer Ian Griffin said it was only a partial eclipse so wouldn't be as dark as a full one, but would still be quite "fascinating".
"About a quarter of the moon should go a reddy colour or will certainly go dark and that's because the shadow of the Earth is on it."