May is double the fun for Full Moon and space fans because we’re getting two in one month. The first took place on May 1 and the second will be on May 31. This phenomenon is called a Blue Moon. And no, that doesn’t mean it’ll actually turn the color blue, it’s just a somewhat rare occurrence. You might say, “once in a blue moon”... What is a Blue Moon? According to NASA , a Blue Moon is when a full moon shows up twice within the same calendar month. The lunar cycle (the process of the Moon orbiting the Earth) lasts about 29 and a half days, which is slightly shorter than most months. This means that every so often the timing lines up like it does in May, with a full moon right at the start of the month and another at the end. It’s not especially common, only happening roughly every couple of years. This is a monthly Blue Moon. There are also seasonal Blue Moons. These occur when four full moons fall all within one season, instead of three whic...
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