EntityQ1607611· pop 15· linked from 28 articlesnocturnalSign in to saveinstrument used to determine the local time based on the relative positions of two or more stars in the night skyConnectionssidereal timeEntitySunConceptstarEntitywoodEntityInternational Standard Book NumberEntityUTCEntityUrsa MajorEntitylongitudeEntityNorthern HemisphereEntitybrassEntitytideEntityUrsa MinorEntityPolarisEntityCassiopeiaEntitysundialEntityastrolabeEntityRamon LlullEntityEarth's rotationEntityBig DipperEntityanalog computerEntityCategoriesAstronomical instrumentsNavigational equipmentObsolete scientific instruments