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A giant underground experiment has given researchers their first glimpse into the heart of the sun and the subatomic particles that shine down on Earth everyday.
Scientists have long theorized how these particles, called neutrinos, are formed in the solar inferno, but direct proof has been hard to come by. Neutrinos can give scientists a priceless glimpse into the inner workings of the sun because they arrive on Earth virtually unchanged from when they left the sun's interior.
Princeton researchers, working at the underground Gran Sasso National Laboratory in Italy, have made the first real-time observations of low-energy solar neutrinos, fundamental particles that are created by the roiling nuclear reactions inside the sun and that stream in vast numbers from the sun's core.
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