Sir Norman Lockyer



  He was the director of the solar physics observatory of the Royal College of Science at South Kensington in London, England. Lockyer proposed, from the observation by Janssen of a yellow line in the sun’s spectrum, that a new element had been detected. This element — helium — was not uncovered on earth until almost thirty years later.



  1. Photographs of London, England (Oxford Street)

  2. Photograph of London, England (spectral lines D1 and D2)

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