It's like natural light pollution," Laura Driessen, a postdoctoral researcher at the Sydney Institute for Astronomy, told SBS News."It's tens of thousands of times brighter than the brightest star in the night sky."The event is considered uncommon because it combines two separate astronomical phenomena at the same time: the blue moon and the micromoon, something skywatchers do not get to see very often.Here is everything you need to know about the rare blue micromoon:The first thing you need to know is that the moon will not be blue, and it has nothing to do with the phrase "once in a blue moon"."There are two different types of blue moon: a seasonal blue moon and a calendar blue moon A seasonal blue moon is the third full moon in an astronomical season with four full moons.According to Driessen, "every couple of years we get an extra full moon in a year".What makes this event even rarer is that the blue moon will also be what astronomers call a "micromoon"."At one point in its orbit, the moon is closer to the Earth, and that closest point is called the perigee