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www.southgatearc.org
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Giant cosmic-ray laser to flash across Paris skyThe rooftop of a Paris skyscraper will to be transformed into a giant cosmic-ray detector in an unusual week-long experiment that is due to start on Saturday. Every time the machine, which will be placed on top of the 689-foot high Montparnasse Tower - Paris's tallest building - picks up a sub-atomic particle called a muon, a pulse of laser light will flash across the sky of the city's Latin Quarter from the Paris Observatory. Muons are debris from protons that are blasted out from the Sun or beyond our Solar System and constantly bombard the Earth. You can read the full Telegraph article 'Giant cosmic-ray laser to flash across Paris sky' at:
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