When a neutrino passes through matter, it will on rare occasions interact with it, typically ejecting high-speed electrons. As these electrons pass through the surrounding material at close to the speed of light, they produce Cherenkov radiation, which emanates in a cone shape centered along the electron's direction of motion.
This image is used with permission of the Sudbury Neutrino Observatory.
The star chart background was produced on a Macintosh with the Voyager II program,
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Last update: 1999 July 13
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