Alberto da Saxônia e a argumentação por dez orbes celestes no século XIV

• Autor(a) principal: Bombini, Raíssa Rocha
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_SP
• Texto Completo: https://tede2.pucsp.br/handle/handle/19676
• topic: Saxônia, Alberto de (ca.1316-1390); Cosmologia; History of Science; History of Cosmology; Albert of Saxony; CNPQ::CIENCIAS HUMANAS::HISTORIA::HISTORIA DAS CIENCIAS

In the middle of the fourteenth century, Albert of Saxony, master of the faculty of arts of the University of Paris, composed a treatise in the form of Quaestiones commenting on the Aristotelian work De Caelo et Mundo. In the 6th question of the second book from the treatise, Albert proposed to clarify how many spheres would exist in the cosmos, suggesting then that there were ten, two beyond the orb of the stars. In order to support his thesis, Albert cited in his arguments Thabit ibn Qurra, a harranite scholar from the ninth century, to whom it was attributed, during the Middle Ages, the discovery of a movement of the fixed stars called motus accessus et recessus. This motus was used to explain the celestial structure defended by Albert, who attributed it to the orb of the stars, justifying the extra orbs. We consider that the presence of Thabit, in Quaestio 6 from this work, might be explained due to the use of rhetoric - which was fundamental to the construction of the quaestiones -, since its argumentative structure frequently used the quotation of textual authorities, the auctoritas. Therefore, the present study aims to analyze Quaestio 6 in a way to clarify Alberto's argument in defense of the ten celestial orbs, as well as his use of the ideas of Thabit ibn Qurra. Thus, we hope to contribute to the studies on this writing of Albert of Saxony and his role in Cosmology of the late Middle Ages