How 19th Century Lighthouses Power Advanced Space Drives

The technology we use for space exploration gets more advanced all the time, but some of our most ambitious programs actually rely on optics invented in the 19th century for lighthouses.

Hosted By: Hank Green

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Sources:
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https://www.britannica.com/biography/Augustin-Jean-Fresnel
https://uslhs.org/fresnel-lens
http://www.modulatedlight.org/optical_comms/fresnel_lens_comparison.html

Images:
https://www.istockphoto.com/photo/lighthouse-gm115630391-4271509
https://commons.wikimedia.org/wiki/File:Deep_Space_1_clean_(PIA04242).png
https://commons.wikimedia.org/wiki/File:Animation_of_Deep_Space_1_trajectory.gif
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https://commons.wikimedia.org/wiki/File:Fresnel_lighthouse_lens_diagram.png
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