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Magnetic fields probably pervade all of space extending from
Observing the universe
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angular appears atmosphere axis background brightness Cambridge cent centre components cosmic rays cosmological Cygnus density detected detector diameter disc distance distribution Earth electrons emission lines emitted expansion explosion extragalactic faint Faraday rotation field strength fireball flux focal ratio frequency galactic plane gas clouds gauss globular clusters gravitational high energy Hoyle inch telescope infrared intensity known large red shifts Maarten Schmidt magnetic field magnitude mass matter measure Milky million light motion Mount Wilson muons nebula neutrino astronomy neutrino interactions nuclear observed optical telescopes orbits origin oscillating universe Palomar Observatories parsecs particles physical produced pulsation quasars quasi-stellar objects quasi-stellar radio sources quasi-stellar sources radiation radio astronomy radio emission radio galaxies radio telescopes regions relatively relativistic Sandage seconds of arc solar space spectra spectrum spiral arms spiral structure stars steady state theory stellar suggested supernova synchrotron emission temperature tion ultraviolet variable wavelengths Wilson and Palomar Zeeman