2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/6425On examining the historical development of astrophysical science at the bottom of the world from the early 20th century until today we find three temporally overlapping eras of which each has a rather distinct beginning. These are the eras of Astrogeology, High Energy Astrophysics and Photon Astronomy. A full version of this paper will be submitted to PASA.To appear in the IAU Highlights of Astronomy, Volume 13, Edited by O. Engvold & M. Burton, Published by the Astronomical Society of the PacificAstrophysicstext