EntityQ4119786· pop 18· linked from 401 articlescelestial spheresSign in to savein ancient cosmological models, rotating spheres made of aether in which the stars or planets are embeddedConnectionsepicycleEntityDante AlighieriEntityuniverseEntityNicolaus CopernicusEntityangelEntitygeocentric modelEntityNur ad-Din al-BitrujiEntityastronomy in medieval IslamEntitySunConceptMoonConceptAristotleEntityPlatoEntityMarsEntityVenusEntitystarEntityMercuryEntityJupiterEntityGodEntitySaturnEntityPythagorasEntityCategoriesAncient Greek astronomyEarly scientific cosmologiesPhysical cosmology