The Sun and the Newton constant

Several properties of the solar interior are determined with a very high accuracy, which in some cases is comparable to that achieved in the determination of the Newton constant GN. We find that the present uncertainty ΔGN/GN=±1.5×10−3 has significant effects on the profile of density and pressure, however, it has negligible influence on the solar properties which can be measured by means of helioseismology and 8B neutrinos. Our results do not support recent claims that observational solar data can be used to determine the value of GN with an accuracy of few part in 10−4. Present data cannot constrain GN to much better than 10−2.