Significant achievements in space astronomy, 1958-1964, Issue 92
United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
National Aeronautics and Space Administration, 1966 - Astronautics in astronomy - 73 pages
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absorption Aerobee AERONAUTICS AND SPACE angular resolution antenna impedance B2IV balloon bands blackbody Bowyer Byram calibration celestial objects Chubb collimation cosmic background noise cosmic noise cosmic radio cosmic-noise background Crab Nebula curve detected detector discrete sources Earth's effect estimated uncertainty experiment Explorer XI extinction extragalactic F. G. Smith field of view Figure flown frequencies galactic center galactic plane galaxy GAMMA-RAY ASTRONOMY Geiger counters GIANTS ground-based high-energy gamma rays Huguenin hydrogen INFRARED ASTRONOMY intensity interstellar medium ionization ionosphere Jupiter kilometers launched Mc/sec measurements ments minute of arc model atmospheres NASA nebulosities obtained orbit photometry Plot Star Spectral point source radiation Radio Astronomy Radio Astronomy Explorer radio emission radio sky region rocket satellite scanning scintillation Scorpio source sensitive signals solar spacecraft spectrum Spica stars observed stellar models Stratoscope telescope tion ULTRAVIOLET AND INFRARED ultraviolet astronomy upper limit values wavelengths X-RAY AND GAMMA-RAY X-ray astronomy X-ray sources