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The shadowy outline of a jet airliner photographed against ths sun by a powerful telescope-camera, at the Lockheed Solar Observatory overlooking Los Angeles. The aircraft’s exhaust plumes appear to be erupting solar flares. The observatory is undertaking a long-range study of the Sun’s effects on the Earth. On clear days the Sun is photographed every 10 seconds. Press, 17 November 1980, Page 14