2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83957The effect of stellar aberration seems to be one of the simplest phenomena in astronomical observations. But there is a large literature about it betraying a problem of asymmetry between observer motion and source motion. This paper addresses the problem from the point of view of Euclidean space-time, arising from the proposition that stellar aberration (or Bradley aberration) gives rise to a Lorentz expansion.8 pages,1 figureGeneral Physicstext