Our Present Knowledge of the Universe |
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aerial associated astronomical azimuth and elevation beam width bogies bowl cable central pivot central region centre control room corona cosmical cosmological problem degrees density diametral girder disc distance earth's atmosphere electrons elevation drive energy equipment existence extragalactic nebulae flare hot body hydrogen hydrogen gas increases initial instrument ionized ionosphere Jodrell Bank laboratory large radio telescope Luna 9 lunar Lunik magnetic field magslips Mark I telescope measurements metres miles Milky million light million years ago moon motion motor room moving observations obtained optical telescopes orbit origin paraboloid particles pen recorder photographs planets position primeval protons quasars radar radiation radio emission radio galaxies radio telescope radio waves red shift rotation sidereal singular condition solar system solar wind space probes spectrum speed spiral arms stars steady state theory steerable surface telescope beam temperature thousand million tion tons track universe wavelength wavelength of 21 world models zones