Sally Ride became the first US woman in space #OTD in 1983.
She was one of three mission specialists aboard the Space Shuttle #challenger for #STS7. At age 32 she was also the youngest US astronaut.
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Sally Ride’s 1977 letter to #NASA fits in a single post:
"To whom it may concern,
I am a PhD candidate in astrophysics at Stanford University, and am interested in the space shuttle program. Please send me the forms necessary to apply as a 'mission specialist' candidate.
Thank you,
Sally Ride”
