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Rangefinder, Friendship 7
From the collection of National Air and Space Museum. Free to download, adapt and use — no permission needed.
About this work
During his three-orbit flight on February 20, 1962, John Glenn used this photometer/rangefinder to measure the airglow layer around the Earth. Sometimes called a Voasmeter photometer - after Robert Voas, who trained early astronauts for NASA - the device allowed Glenn to look through the filter and make measurements with the small dial. Information could be gathered from these observations on the intensity of both sunlight and starlight.
National Air and Space Museum’s own descriptionSubjects
Credit lineRangefinder, Friendship 7. Unknown. National Air and Space Museum, Transferred from the National Aeronautics and Space Administration. CC0.
