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xkcd #3189: Conic Sections
(imgs.xkcd.com)
Title text:
They're not generally used for crewed spacecraft because astronauts HATE going around the corners.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3189/
“All of Alma Cogan is dead, but only some of the class of dead people are Alma Cogan.”
I better buy some kippers