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Sidereal timeAstrometryEquatorial coordinate systemEcliptic coordinate systemStellar classificationSimbadCosmic distance ladderTerrestrial timePlanetary coordinate systemStellar kinematicsLight-secondExoplanet naming conventionAstronomical symbolsCelestial mechanicsPlanetary massCelestial spherePosition angleEpochGeographic coordinate systemGlossary of astronomyIslam and astrologyObservational cosmologyGeodetic reference system 1980Astronomical coordinate systemsAstronomySpherical astronomyGeocentric modelAstronomical unitBolometric correctionAstronomical objectAstronomical spectroscopySolar luminosityAstronomical catalogKepler's laws of planetary motionIers reference meridianStar catalogueInternational designatorAbsolute magnitudeLuminosity functionExtragalactic astronomyLists of star namesLunar orbitSurface brightnessBarycentric coordinate timePhase angleJanskyParsecAstroparticle physicsApparent magnitudeStellar designations and namesObservational astronomySynodic dayParallactic angleSidereal yearArgument of latitudeElongationAb magnitudeAstrophotographyGalactic coordinate systemPlanetary sciencePlanet symbolsHeliocentrismPlanetary systemEarth observationSextantLight curveEarth observing systemCorrelation functionSatellite geodesyBackstaffNebular hypothesisChinese constellationsAlfonsine tablesInterstellar mediumGalactic yearSolar constantSpace telescopeTrue anomalySelenographic coordinate systemCosmologyStardateOrreryBarycentric julian datePoles of astronomical bodiesBarycenterEkpyrotic universeInternational atomic timePeriod-luminosity relationGalactic astronomyDark energy surveyPhotometric systemProper motionGalaxyPlanetary geologyIntercept methodMetallicityBabylonian astronomyAxial tiltAstronomical nutationSolar longitude