AdvertisementIt's big! It's bright! It's a rare blue supermoon! Here's how to check it out02:17Download AudioResumeAugust 29, 2023Emily OlsonfacebookEmailThis picture taken on Aug. 1, 2023, shows the second supermoon of 2023, also known as the sturgeon moon, rising behind the Cuatro Torres business area in Madrid. (AFP via Getty Images)