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| Explorer 6 launch cover with Goldcraft cachet. |
Explorer 6 was a NASA satellite launched on 7 August 1959, at 14:24:20 GMT. It was a small, spheroidal satellite designed to study trapped radiation of various energies, galactic cosmic rays, geomagnetism, radio propagation in the upper atmosphere, and the flux of micrometeorites. It also tested a scanning device designed for photographing the Earth's cloud cover. On 14 August 1959, Explorer 6 took the first photos of Earth from a satellite.
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| Explorer 6 launch cover (unknown cachet maker) with Patrick Air Force Base postmark. |
(Reference from
Explorer 6)
