Beskrivning : OGO 4 satellite and Vandenberg post stamp.
OGO 4 was a large observatory instrumented with experiments designed to study the interrelationships between the aurora and airglow emissions, energetic particle activity, geomagnetic field variation, ionospheric ionization and recombination, and atmospheric heating which take place during a period of increased solar activity.
Är UTANFÖR Rymdrevyerna.