The first of four full supermoons this year has lit up the night skies around the world.

In some places, the supermoon - also a blue moon - turned red due to smoke from wildfires in North America. Smoke particles mean that light passing through the atmosphere is scattered in such a way that the orange and red colours of the spectrum are more visible than usual.

Blue moons are not that common - it's thought this is where the phrase "once in a blue moon" comes from.

The full moons of September, October - the closest moon this year - and November will also be supermoons.

Read More