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Neil deGrasse Tyson Explains The International Date Line

2023-05-09 Science & Technology
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Description

What is the International Date Line? Neil deGrasse Tyson and comedian Chuck Nice break down the history and purpose of the IDL. How do we know we needed a date line? Find out how the need for an international date line was discovered and why it was an accident. Where did we decide to put the date line? Plus, Chuck questions the existence of Mountain Time. Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/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 00:00 - The international date line is weird 02:00 - Circumnavigation & Time 08:07 - Observer Bias 11:40 - IDL Placement

Top Comments (10)

@celsopinheiro 2023-05-09

The passenger steamer SS Warrimoo was quietly knifing its way through the waters of the mid-Pacific on its way from Vancouver to Australia. The navigator had just finished working out a star fix and brought Captain John DS. Phillips, the result. The Warrimoo’s position was LAT 0º 31’ N and LONG 179 30’ W. The date was 31 December 1899. “Know what this means?” First Mate Payton broke in, “We’re only a few miles from the intersection of the Equator and the International Date Line”. Captain Phillips was prankish enough to take full advantage of the opportunity for achieving the navigational freak of a lifetime. He called his navigators to the bridge to check & double check the ship’s position. He changed course slightly so as to bear directly on his mark. Then he adjusted the engine speed. The calm weather & clear night worked in his favor. At mid-night the SS Warrimoo lay on the Equator at exactly the point where it crossed the International Date Line. The consequences of this bizarre position were many: The bow of the ship was in the Southern Hemisphere & in the middle of summer. The stern was in the Northern Hemisphere & in the middle of winter. The date in the aft part of the ship was December 31, 1899. The date in the forward part of the ship was January 1, 1900. The ship was therefore concurrently in: two different days, two different months, two different years, two different seasons and in two different centuries. Euller, John (Sept.1953). "A freak of navigation". Ships and the Sea. 3. p. 18

259 19 replies
@matikassantos8218 2023-05-10

I'm from the Philippines and I'd like to add that Ferdinand Magellan died in the Philippine islands when he was trying to convert the native Filipinos to Christianity and got involved in the rivalry between two tribal kings. Magellan tried to convert one of those tribal chiefs by force. He had around 60 troops while the resisting natives numbered 1,500 in the Battle of Mactan.

168 25 replies
@StarTalk 2023-05-09

Which time zone are you in?

136 175 replies
@AmbrishSaxena12 2023-05-09

Neil is one of the real messenger of the universe.

77 8 replies
@gabecrigger2204 2023-05-10

You guys have shown me how much I truly love science. You have taught me so much in the recent years. I have decided to quit my factory job and go back to college to pursue a science degree. Thanks for all you do, and inspiring me to pursue something I love!

55 4 replies
@pragmaticcrystal 2023-05-09

Thank you for your time and effort you are much appreciated 💛

35 1 replies
@darcioehler2942 2024-03-07

Did Neil just say " see you next Tuesday"? And did you hear Chucks response..... omg love the two

12 1 replies
@CountGremlin 2023-05-09

I remember that Zack & Cody Timezones episode. As a kid, i thought the international line was just a made up movie thing 😂

11
@mrrj44 2025-03-12

Antonio Pigafetta is the original “cameraman never dies”

3
@martinmdoma8115 2023-11-02

Antonino is the definition of " the camera man doesn't die"😅

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