Gemini Experiments Tested How Well Astronauts Could See Earth From Orbit

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NASA astronaut L. Gordon Cooper Jr. captured 29 color photographs of Earth using a 70mm camera during the Mercury-Atlas 9 mission in May 1963. Flying aboard his Faith 7 spacecraft, Cooper reported remarkably sharp visual observations from orbit, including vehicles on dirt roads and smoke-emitting trains. His accounts raised scientific interest in understanding the limits of human visual acuity in space. These observations laid the groundwork for formal visual acuity experiments that would follow during the later Gemini program.

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