There's been a few different kinds of spacecraft docking mechanisms over the years - Hiyu explains!

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Wikipedia links:
Docking & Berthing https://en.wikipedia.org/wiki/Docking...
Probe & Drogue https://en.wikipedia.org/wiki/SSVP_do...
APAS https://en.wikipedia.org/wiki/Androgy...
International Docking System Standard https://en.wikipedia.org/wiki/Interna...
Apollo-Soyuz Test Project https://en.wikipedia.org/wiki/Apollo%...

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