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Remarkable research and model (in Orbiter) of the Gemini rendezvous process

Gemini semi-optical rendezvous tutorial (v 0.3)

Spacewar challenge: Rendezvous rather than shoot. Extra credit: explain how

How should I use to RT a tweet to my known site *and* give the source real Twitter RT credit?

Orbiter (simulator) - Wikipedia, the free encyclopedia freeware "space flight simulator program developed to simulate spaceflight using realistic Newtonian physics"

@Withknown One of my s is:
Select enough text so the post is too long for Twitter,
cancel the select,
click the bookmarklet,
[Twitter] (optional),
tag more,