Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Above, scientists check the equipment surrounding a huge tank of extremely pure water from the Super-Kamiokande experiment in Japan, designed to detect colliding neutrinos . Large detectors are needed because the neutrino is an elementary particle that goes right through practically everything. Reasons for the lack of solar neutrinos may include a more complex theory for electroweak interactions than currently in use. Future results from detectors like Super-Kamiokande may help us know more.
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