Beskrivning : The Einstein Observatory (HEAO 2) was the second of three missions in a program of research in high-energy astronomical phenomena. The science objectives of this mission were imaging and spectrographic studies of specific X-ray sources and studies of the diffuse X-ray background. More specifically, scientific objectives were
(1) to locate accurately and examine X-ray sources in the energy range 0.2 to 4.0 keV, with high resolution;
(2) to perform high-spectral-sensitivity measurements with both high-and low-dispersion spectrographs; and
(3) to perform high-sensitivity measurements of transient X-ray behavior.

Kennedy Space Center post stamp and satellite high energy astronomy observatory HEAO 2.

USA 1201 - picture enhanced ?

Sida : future · Ref: USA 1201 

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HEAO 2 (EINSTEIN) (SATELLITE) · ATLAS SLV3D