Science

Did We Find Longitude Thanks To A…Clock?

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The equator is a clear and accurate line around Earth that makes measuring latitude a precise science, but when it came to figuring out how to do that with longitude, British sailors were at a loss. Until they devised a competition.

Hosted by: Michael Aranda

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Sources:

History of Navigation at Sea: From Stars to the Modern-Day GPS

The History


https://www.nationalgeographic.org/encyclopedia/prime-meridian/print/
http://www.thestargarden.co.uk/Longitude.html
https://www.rmg.co.uk/stories/topics/harrisons-clocks-longitude-problem
https://ticktocktony.com/Newsletter/clock-maker-john-harrison.html
https://www.inverse.com/article/43165-john-harrison-chronometer
https://bit.ly/3rNtq93
https://bit.ly/3dxCdnl
https://www.rmg.co.uk/collections/objects/rmgc-object-79139
https://www.rmg.co.uk/collections/objects/rmgc-object-79140
https://www.rmg.co.uk/collections/objects/rmgc-object-79141
https://www.rmg.co.uk/collections/objects/rmgc-object-79142
https://doi.org/10.1016/j.eeh.2016.09.001
https://doi.org/10.1080/00253359.1998.10656713
https://bit.ly/31HZzEf
https://bit.ly/3pIkfEt
https://bit.ly/3GlxPE8
http://cudl.lib.cam.ac.uk/view/ES-LON-00024/1
https://www.gps.gov/multimedia/poster/
https://www.gps.gov/applications/timing/
https://www.britannica.com/technology/atomic-clock
https://bit.ly/3EJnnGs
https://bit.ly/3rOdOT0
https://frodsham.com/commissions/h4/#

The Chronometers of John Harrison and the Problem of Longitude

Image Sources:
https://www.istockphoto.com/
https://www.storyblocks.com/
https://commons.wikimedia.org/wiki/File:Globenmuseum_Vienna_20091010_479.JPG
https://commons.wikimedia.org/wiki/File:Rotating_earth_animated.gif
https://commons.wikimedia.org/wiki/File:Clock-pendulum.gif
https://commons.wikimedia.org/wiki/File:Leonhard_Euler.jpg
https://commons.wikimedia.org/wiki/File:John_Harrison_(Gem%C3%A4lde).jpg
https://commons.wikimedia.org/wiki/File:Edmond_Halley_072_old_version.jpg
https://commons.wikimedia.org/wiki/File:George_Graham.jpg
H1
Clock that changed the world (H1, 1730-35)
https://commons.wikimedia.org/wiki/File:Clock_that_changed_the_world_(H4,_1759)_-_Flickr_-_Tatters_❀.jpg
https://commons.wikimedia.org/wiki/File:Harrison_H4_clock_in_The_principles_of_Mr_Harrison%27s_time-keeper_1767.jpg
Harrison's H4
IMG_3581
Harrison's H4 (detail)
https://commons.wikimedia.org/wiki/File:TableLatLongStarsMoonDistBradleyNautAlmanac1767.jpg
https://commons.wikimedia.org/wiki/File:Lunars-star-map.jpg
https://commons.wikimedia.org/wiki/File:GodfreyKneller-IsaacNewton-1689.jpg
https://commons.wikimedia.org/wiki/File:Maskelyne,_Nevil_%E2%80%93_Tables_requisite_to_be_used_with_the_astronomical_and_nautical_ephemeris_for_finding_the_latitude_and_longitude_at_sea,_1781_%E2%80%93_BEIC_782957.jpg
https://commons.wikimedia.org/wiki/File:Microcosm_of_London_Plate_021_-_House_of_Commons_(colour).jpg
https://commons.wikimedia.org/wiki/File:The_American_ephemeris_and_nautical_almanac_(1855)_(14583824780).jpg
https://commons.wikimedia.org/wiki/File:Marconi_radio_room_aboard_the_%27Olympic%27.jpg
https://commons.wikimedia.org/wiki/File:GPS_Satellite_NASA_art-iif.jpg
https://commons.wikimedia.org/wiki/File:Atomic_Clock-Louis_Essen.jpg

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