Detecting Neutrinos From The Sun

The Sun shines brightly to our eyes, but is three times dimmer in neutrinos than it should be for the amount of energy it is producing. How that can happen has been a mystery for twenty years. It was long thought to be an error in our understanding of how the Sun works, but new experiments and new ideas about particle physics are lending support to the possibility that it is the neutrino itself that was not understood. If so, a revolution in particle physics and our understanding of the universe may be at hand. We describe the remarkable experiments that have brought us to this point, and new ones to come.