2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/12128After a brief summary of neutron star cooling theory I present results which emphasize the importance of baryon pairing in the neutron star core. I show how the thermal evolution may be totally controlled by pairing for models which include only nucleons and models containing also hyperons. Finally, I consider the thermal evolution of ultramagnetized neutron stars whose existence has been inferred from the soft gamma repeaters.8 pages LaTeX with 3 eps figures. Uses neu.sty and tron,sty (included). Invited talk at the meeting `Neutron Stars and Pulsars', Tokyo, Nov. 1997Astrophysicstext