Two of the four supermoon events of 2023 will take place in August, with the first happening on Tuesday. On Aug. 30, there will be a blue supermoon, which won't happen again until 2032. Here's what you need to know so you can catch this summer's lunar double feature.

What is a supermoon?

A perigean full moon, better known as a supermoon, happens when the moon is full during the closest point in its orbit around Earth. This gives its appearance an extra pop, making it look up to 8% bigger and 16% brighter than a typical full moon, according to The Old Farmer's Almanac.

According to NASA, the moon's typical orbit ranges between 226,000 and 251,000 miles from Earth, but variances can bring it a bit closer or farther away. Only the closest three or four approaches each year qualify as supermoons. The last one was on July 3.