Geocentrism was never dogmatically defined, nor was heliocentrism defined ex cathedra to be formally heretical. First, heliocentrists do not hold, 《“That the sun is in the centre of the world and altogether immovable by local movement,”》Modern heliocentrism only professes the sun to be at the center of the solar system; and not the center of the universe, as was profesded by heliocentrists in Galileo's day. Secondly, the cited docuмent is not a magisterial dogmatic constitution but a disciplinary decree addressed to tribunals and nunciatures. It is quite simply not an ex cathedra definition.