EntityQ357781· pop 9· linked from 269 articlesmural instrumentSign in to saveangle-measuring device used for astronomical purposesConnectionsVenEntityAncient EgyptEntityAncient GreeceEntityAlexandriaCityThalesEntityDemocritusEntitytelescopeEntitySamarkandEntityPtolemyEntityHesiodEntityTycho BraheEntityStraboEntityzodiacEntityastronomical objectEntityAnaximanderEntityEratosthenesEntitydigital object identifierEntityEdmond HalleyEntitysolsticeEntityHipparchusEntityCategoriesAncient Egyptian scienceAncient Egyptian technologyAncient Greek astronomyAngle measuring instrumentsAstronomical instrumentsAstronomy in the medieval Islamic worldEgyptian inventionsObsolete scientific instrumentsTechnology in the medieval Islamic world