2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/190371Recent work on neutrino propagation in stochastic media and its implications for the Sun and core-collapse supernovae are reviewed. It is shown that recent results from Sudbury Neutrino Observatory and SuperKamiokande combined with a best global fit value of $δm^2= 5\times 10^{-5}$ eV$^2$ and $\tan^2 θ= 0.3$ rule out solar electron density fluctuations of a few percent or more. It is argued that solar neutrino experiments may be able to rule out even smaller fluctuations in the near future.4 pages, to be published in the proceedings of the International Nuclear Physics Conference (INPC 2001): Nuclear Physics And The 21st Century, 30 Jul - 3 Aug 2001, Berkeley, CaliforniaHigh Energy Physics - Phenomenologytext