If you can see a bigger, brighter full moon tonight, you're not alone.
The supermoon, or perigee full moon as astronomers call it, is on its way.
It's when the moon is at or near its closest approach to Earth.
Mount John Observatory resident superintendent Allan Gilmore says the moon won't appear much bigger, but it will be brighter.
"The amount of light we get from the moon depends on how big it looks, so a slightly bigger moon will be giving us slightly more light."
Mr Gilmore says the perigee full moon will be able to be seen by anyone who has clear skies tonight.
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Photo: Getty Images