2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/844A popular interpretation of recent microlensing studies of the line of sight towards the Large Magellanic Cloud invokes a population of old white dwarf stars in the Galactic halo. Below I review the basic properties of old white dwarf stars and the ongoing efforts to detect this population directly.TeX, 7 pages plus 2 postscript figures To be published in: Microlensing 2000. ASP Conference Series, Eds. J W Menzies, P SackettAstrophysicstext