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The Reason We Have 7 Days in a Week

How did we get the days of the week? Neil deGrasse Tyson and comedian Chuck Nice break down the planets of the ancients and how they correspond to our days of the week. How many planets were there to the ancient Greeks and Romans? Learn about the meaning of the word “planet,” the names of the days, and how we got seven days in a week. Plus, learn how Copernicus later discovered a planet that was right under our noses. Timestamps: 00:00 - Introduction: The Days of the Week 00:28 - The Planets 2:04 - The Origin of Each Day 7:10 - Why We Have Seven Days Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon:   / startalkradio   FOLLOW or SUBSCRIBE to StarTalk: Twitter:   / startalkradio   Facebook:   / startalk   Instagram:   / startalk   About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson