2.Blue supermoons are rare because two separate celestial occurrences are happening at the same time.
3.A supermoon happens when the moon is at its full tilt (aka a full moon) while its orbit is simultaneously closest to earth.
4.Typically, only three or four supermoons occur a year.
5.As for a blue moon, according to NASA, a blue moon is not actually the color blue.
6.It's the name for the rare time when a full moon appears twice in one month.
7.Because the moon's cycle is 29.5 days long, and nearly every calendar month is longer, NASA says every two to three years the gap between the moon's cycle and the calendar month lead to a blue moon.
8.But when there are two supermoons occurring in one month, it's called a blue supermoon.
9.That's what happened this month, as last night's supermoon followed a previous one on Aug. 1.
10.According to NASA, a blue supermoon typically occurs every 10 years but can take as long as 20 years.
11.Across the globe, photographers were out taking photos of the rare lunar phenomenon.
12.In Rabat, Morocco, the blue supermoon illuminated the night sky.
13.Here's a stunning photo as seen from London of a plane flying by the blue supermoon.
14.Here's the moon behind the Albert Hall Museum in Jaipur, India.
15.So hopefully, you got a chance to see the gorgeous, gorgeous moon last night.
16.But if you didn't, scroll up and relive it all again because 2037 is a long time away!