This paper answers a series of questions: Why study solar neutrinos? What does the combined standard model (solar plus electroweak) predict for solar neutrinos? Why are the calculations of neutrino fluxes robust? What are the three solar neutrino problems? What have we learned in the first 30 years of solar neutrino research? For the next decade, what are the most important solvable problems in the physics of solar neutrinos? What are the most important solvable problems in the astrophysics of solar neutrinos?