News & Stories Science Here's why tonight's blue supermoon is so special Erika Ryan Justine Kenin August 19, 2024 / 3:24 pm Monday marks a rare cosmic event: a blue supermoon. It’s a combination of a supermoon, when it’s closest to Earth, and a blue moon, which is the third of four full moons in a season. Why you can trust KUOW Recommended Stories Can the power of a star lower our electric bills? November 20, 2025 Trump might shut down UW’s Primate Research Center. Should he? October 06, 2025 UW lab spinoff focused on AI-enabled protein design cancer treatments September 12, 2025