The progress on the dynamics of the radiative zone by global Doppler velocity measurements aboard SoHO (GOLF+ MDI) and with ground networks (BiSON and GONG) opens a new perspective for solar and stellar physics. It is why we prepare a new generation of solar resonant spectrometer. The objectives of the GOLF-NG instrument and its present status are described. We have demonstrated this year that most of the technical challenges have been successfully faced and the next steps are mentioned. We then recall the scientific questions that might be solved with the next generation of instruments in construction in different european laboratories to reach a complete 3D vision of our star from the core to the corona. Two formation flying missions DynaMICCS and HIRISE have been proposed to ESA in the framework of the 2015-2025 Cosmic Vision perspective to contribute to solve these questions. A strategy of measurements must be found for the next decade.