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History of the compassCompassEquatorial coordinate systemLatitudeHorizontal coordinate systemEcliptic coordinate systemMeridian arcGeographic coordinate systemLongitudeMeridianCompass roseCircle of latitudePoles of astronomical bodiesCelestial equatorMagnetic dipHour angleMeridian altitudeRight ascensionHemispheres of earthCelestial sphereMagnetic declinationAstronomical coordinate systemsCelestial navigationFlag of bonaireNautical almanacSextantParallactic angleAzimuthPolar alignmentAstrometryTrue northSpherical astronomySidereal timeDeclinationGeomagnetic poleGalactic coordinate systemEquatorPlanetary coordinate systemNorthern celestial hemispherePolar motionMollweide projectionChinese star mapsGps signalsSolar longitudeSolar azimuth anglePhase angleArgument of latitudeAxial tiltCelestial polePortolan chartStereographic map projectionEarth's rotationGyrocompassHorizonAxis mundiCircular orbitQuadratureSouthern celestial hemisphereOrbitSelenographic coordinate systemSun sensorPlanispherePosition angleEarth-centered inertialConstellationSolar timeAstrological signMariner's astrolabeHeliocentrismNorth magnetic poleHistory of longitudeBackstaffCelestial globeStar chartEquinoxHistory of sundialsOrbital nodeIntercept methodAstrological aspectIslam and astrologyOrbital inclinationSolar zenith angleAstronomical symbolsSolar calendarPosition of the sunElongationSun pathIers reference meridianAlignmentBarycenterCruxEarth radiusDiurnal motionTropic of capricornSundialOrbit determinationOrreryFirst point of ariesTopography of the moonMeridian circle