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Unlike its name suggests, a blue moon is not named after the colour but instead refers to the second full moon in a calendar month.
Most months only have one full moon, therefore, a second is a rare event, occurring approximately once every two or three years.
It marks the first time in five years that two supermoons have appeared in the same month, a rarity astronomers don’t expect to see again until 2037.
The biggest and brightest Moon of the year was visible on Wednesday night.
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The last time two full supermoons were seen in the same month was in 2018.
According to the United States National Aeronautics and Space Administration (NASA), about 25% of all full moons are supermoons and two super blue moons in January and March of 2037.
