What Exactly Is a Blue Moon?

The term 'blue moon' was figurative a long time before astronomers assigned various definitions. Learn why blue moons aren't blue and what they can mean in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/is-blue-moon-really-blue.htm Learn more about your ad-choices at https://www.iheartpodcastnetwork.com