A blue moon is when there is a second full moon in a month. A seasonal blue moon is the third of four full moons in one season.
Most importantly, a blue moon is not blue!
So why is it called a ‘blue moon’? It first appeared blue when Mount Krakatoa erupted in 1883 and dust and ash filled the air. This filter gave the moon a bluish hue.
This Saturday, 18 May, 2019, you will be able to see the ‘seasonal blue moon’ hanging lower and therefore looking bigger than it usually does. Because it is happening around spring time when the flowers bloom, it is called a blue flower moon.
Check it out and let us know what you think!