British Broadcasting Corporation

Page last updated at 05:54 GMT, Tuesday, 23 June 2009 06:54 UK

Street lights wreck space research

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Astronomers in southern France have launched a campaign to create a "sky reserve" above the Pyrenees mountain range.

They warn that unless cities reduce their night time lighting it will soon become nearly impossible to observe the stars at night.

Chris Bockman reports.

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