The Homestake Solar Neutrino Experiment was a groundbreaking scientific endeavor conducted at the Homestake Gold Mine in South Dakota. The experiment was designed to measure the flux of solar neutrinos, which are particles produced in the nuclear fusion reactions that power the Sun. The experiment was
A solar neutrino is a neutrino originating from nuclear fusion in the Sun's core, and is the most common type of neutrino passing through any source observed on Earth at any particular moment. Neutrinos are elementary particles with extremely small rest mass and a neutral electric charge. They only interact with matter via weak interaction and gravity, making their detection very difficult. This has led to the now-resolved solar neutrino problem. Much is now known about solar neutrinos, but research in this field is ongoing.