Why the Sun Moves in Figure 8s Across the Sky

From StarTalk.

How long is a day? Neil deGrasse Tyson and Chuck Nice break down what an analemma is, the solstices, and why Christmas is in December.

Does the sundial– that we’re all definitely still using– get noon wrong? Learn what an analemma is and what it is doing on globes and sundials. Discover the summer and winter solstices and how the ancients tracked time.

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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!

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00:00 – What is an Analemma?
00:48 – How Long is Day?
4:31 – When is High Noon?
6:33 – Understanding the Solstice
8:32 – The Origins of Christmas