Significant Achievements in Space Astronomy, 1958-1964 |
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absorption Aerobee angular resolution antenna impedance BALLOON bands blackbody Bowyer brightness bursts Byram calibration celestial objects Cen B2 Chubb cm² collimation cosmic background noise cosmic noise cosmic radio cosmic-noise background counting rates Crab Nebula curve detected detector Earth's energy experiment Explorer XI extinction extragalactic field of view Figure frequencies galactic center galactic plane galaxy GAMMA-RAY ASTRONOMY Geiger counters GIANTS ground-based high-energy gamma rays hydrogen INFRARED ASTRONOMY intensity interstellar medium ionization ionosphere Jupiter kilometers launched Lup B2 Mc/sec measurements ments minute of arc model atmospheres NASA nebulosities obtained orbit payload photometry Plot Star point source radiation Radio Astronomy Radio Astronomy Explorer radio emission radio sky receiver region reported rocket satellite scanning Scorpio source sensitive signals solar spacecraft spectral type spectrum Spica stars observed stellar models Stratoscope telescope tion ULTRAVIOLET AND INFRARED ultraviolet astronomy values wavelengths X-RAY AND GAMMA-RAY X-ray astronomy X-ray sources
Popular passages
Page 36 - Canis Majoris. The wavelength is given in microns. The resolution is 50 A, and the scanning rate is 5000 A/sec. The saturated signal to the right of a Carinae is the southern airglow horizon.
Page 34 - A plot of the ratio of the ultraviolet brightness of stars observed at 1314 A to their visible brightness at 5560 A as a function of spectral type. The numbers adjacent to each data point...
Page 67 - Me/sec, which is normally presented by the ionosphere from reaching surface-bound radio telescopes. To date, the radio-astronomy experi-ments have not usually been the prime objective of a satellite mission, but development is underway of Radio Astronomy Explorer satellites designed specifically for me-dium- and low-resolution measurements of the cosmic background and observations of low-frequency radio bursts from the Sun and planets. 67 References 1. STROM, SE; AND STROM, KM: Interstellar Absorption...
Page 21 - X-ray work was made by NRL scientists in 1964 when they used the Moon as an occulting disk to locate to within 1 minute of arc a source near the center of the Crab Nebula. By the end of 1964, 10 X-ray sources had been detected and their positions located to within a degree or two. All the sources lie rather close to the galactic plane and within 90° of the galactic center. Hence they appear to be galactic rather than extragalactic objects, and may be in some way associated with the newer disk population...