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Astronomical Principles Governing the Con
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annual motion astronomical attached building celestial equator Comet Donati Comet Donati 1858 connection constellation figures construction demonstration devices diameter diapositives distance diurnal and annual diurnal motion dome of 23 eccentricity ecliptic ecliptic axis equatorial network fixed stars gegenschein German Museum globe hemisphere hour angles hour circle inauguration incandescent lamp Jena Jupiter Kepler lattice ring lecture light line lunar Mars mean Sun Mercury meridian Milky minutes Moon motor Munich nautical triangle network of reference optical orbital plane performance Planetarium planetary orbits planets plates polar altitude position precession precession dials precessional motion projection apparatus projection dome projection instrument projection room projection surface projector projector of constellation Projector of shooting reference lines reproduced revolution round the Sun Saturn scale of hour Sect shooting stars sidereal Sirius sky of fixed solar system southern sphere starry heavens switch desk synodical month terrestrial variable stars Venus visitors Zeiss Zeiss Planetarium zenith zodiacal