Helioseismic estimates of solar structure and dynamics

The only star whose structure and dynamics we know with confidence is the Sun. During the last decade, helioseismology has provided us a unique tool to study the solar interior. Helioseismology has been concerned with the radial structure and dynamics of the Sun for a long time. However, once high precision GONG and MDI data were available, the focus shifted to the latitudinal dependence, mainly of solar rotation. Attempts to determine the latitudinal dependence on structure came later. We discuss what helioseismology has revealed about the radial as well as the latitudinal dependence of the structure and dynamics of the Sun.