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How Long is a Year, Actually?

How long is a year? Neil deGrasse Tyson and comedian Chuck Nice explain the real length of a year, leap days, and our orbit around the sun. Is a year what we think it is? Find out why the year is not 365 days and why Leap Day does not quite solve the problem. Are there other types of years we could go off of? Learn about the sidereal year and how Earth's orbit precesses around the sun. Plus, what made the leap year in 2000 so rare? Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Get the Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF 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 Timestamps: 00:00 - How Long is a Year? 03:42 - Does Leap Day Fix the Problem? 06:30 - Why 2000 Was a Rare Leap Year 8:15 - Seasonal Calendars, The Sidereal Year, & Other Kinds of Years