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Space History Photo: Guion Bluford Experiences Weightlessness on the KC-135

space history, nasa, zero gravity
Astronaut Guion S. Bluford and Aviation Safety Officer Charles F. Hayes get a unique perspective of the environment during a 1979 zero gravity flight. (Image credit: NASA.)

In this historical photo from the U.S. space agency, Astronaut Guion S. Bluford and Aviation Safety Officer Charles F. Hayes got a unique perspective of their environment during a zero gravity flight. They are aboard a KC-135 aircraft, also known as the vomit comet, which flies a special parabolic pattern repeatedly to afford a series of 30-seconds-of-weightlessness sessions.

Bluford and Hayes are being assisted by C.P. Stanley of the photography branch of the photographic technology division at JSC. Some medical studies and motion sickness experiments were conducted on this particular flight. Bluford is one of 20 scientist astronauts who began training at JSC in July 1978.

Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).

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The National Aeronautics and Space Administration (NASA) is the U.S. government agency in charge of the civilian space program as well as aeronautics and aerospace research. Founded in 1958, NASA is a civilian space agency aimed at exploring the universe with space telescopes,  satellites, robotic spacecraft, astronauts and more. The space agency has 10 major centers based across the U.S. and launches robotic and crewed missions from the Kennedy Space Center in Cape Canaveral Florida. It's astronaut corps is based at the Johnson Space Center in Houston. To follow NASA's latest mission, follow the space agency on Twitter or any other social channel, of visit: nasa.gov