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Apparent magnitudeVisual magnitudeMagnitudeAbsolute magnitudeAstrometerRadiometric magnitudeBolometric magnitudeLuminosity distanceStandard candlePlanetary massObservable universeAstrometryBolometric correctionAstrophotometryPhotometryLuminosity functionMetallicityBlueshiftElevationOptical astronomyAmplitudeStellar classificationSemidiameterFixed starLight curveAltitudeDeep-sky objectMinor planetLimb darkeningMinimumTelescopeLunar distanceLatitudeAstrophotometerTransitInfrared telescopeLight equationAirmassZenithal hourly rateProper motionElongationComet-finderApastronAstrophotographyDescensionApparitionEgressGegenscheinPlanetographyStellar kinematicsOptical depthObservatoryEmersionSpace telescopeAstronomical objectHorizonStarsetSky quality meterOptical spectrumSkyglowLunar orbitAstronomyPlanetary objectMeridianEscape velocityLunar occultationStandard rulerAstrophotoLimbSnow lineReflection nebulaX-ray telescopePeriastronSky brightnessPlanetary aberrationCelestial bodyStar chartMicroscopeApocenterSpectrogramExtraterrestrial skyNight skyBackgroundAntoniadi scaleExtragalactic astronomyChandrasekhar limitVisual binarySynodic periodAlmucantarAstrolabePericenterMean motionRoche limitInterplanetary spaceNightAphelionFirst lightDigitCollimatorCulmination