2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3343Observations of interstellar gas and dust towards nearby stars and within the solar system show that the Sun is embedded in a warm diffuse partially-ionized cloud. This cloud is the leading edge of a flow of interstellar matter (ISM) through our Galactic neighborhood. Interstellar matter sets the boundary conditions of the heliosphere and astrospheres of extra-solar planetary systems. Moreover, the interplanetary regions in these systems are sensitive to inflowing ISM.XVIIth IAP Conference on Gaseous Matter in Galaxies and Intergalactic SpaceAstrophysicstext