2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4983Extra-solar planets can be efficiently detected in gravitational microlensing events of high magnification. High accuracy photometry is required over a short, well-defined time interval only, of order 10-30 hours. Most planets orbiting the lens star are evidenced by perturbations of the microlensing light curve in this time.4 pages, 2 figures. Presented at the Scientific Frontiers in Research on Extra-Solar Planets conference, Washginton D.C., June 2002Astrophysicstext