EntityQ5384292· pop 6· linked from 249 articlesEquatorial ringSign in to saveinstrument to determine the moment of the equinoxesConnectionsSunConceptcloudEntityspringEntityautumnEntitycalendar systemEntitynightEntityeastEntitywestEntitynorthEntitysouthEntityAlexandriaCityequatorEntityThalesEntityDemocritusEntityPtolemyEntitylatitudeEntityHesiodEntityhorizonEntityRhodesEntityStraboEntityCategoriesAncient Greek astronomyAstronomical instrumentsObsolete scientific instruments