The Sun as a reference for Eddington

In this review, I point out the major achievements of the helioseismic community on the physical description of the solar interior and the related efforts which must be performed to reach a corresponding scientific return in asteroseismology with the Eddington mission. I comment on the characteristics of the low degree modes which are the only modes accessible to this mission. Using solar data obtained with the resonant spectrometer GOLF and with the photometric instrument VIRGO onboard SoHO, I recall the importance of the duration of the observations and of the mode characteristics for the determination of internal indicators. This work takes into account the role of stochastic excitation and of solar activity. From all these remarks, I deduce some points which should be discussed during the Eddington preparation phase; in order to guarantee good observations and to prepare for rapid interpretations after launch.