Joint Discussion 17 Highlights of recent progress in the seismology of the Sun and Sun-like stars

The seismology and physics of localized structures beneath the surface of the Sun takes on a special significance with the completion in 2006 of a solar cycle of observations by the ground-based Global Oscillation Network Group (GONG) and by the instruments on board theSolar and Heliospheric Observatory(SOHO). Of course, the spatially unresolved Birmingham Solar Oscillation Network (BiSON) has been observing for even longer. At the same time, the testing of models of stellar structure moves into high gear with the extension of deep probes from the Sun to other solar-like stars and other multi-mode pulsators, with ever-improving observations made from the ground, the success of theMOSTsatellite, and the recently launchedCoRoTsatellite. Here we report the current state of the two closely related and rapidly developing fields of helio- and asteroseimology.