Ghosts of Gemini

Forgotten photos show the human face of NASA's early astronaut program

(NASA/JSC/Arizona State University)

Gemini 9 Trials

(NASA/JSC/Arizona State University)

On Gemini 9, future moonwalker Gene Cernan struggled with overheating and overexertion during his time outside the capsule, leading NASA to revamp its training and procedures for spacewalks.

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