LIBROS DEL AUTOR: francoise launay

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  • The Astronomer Jules Janssen
    Françoise Launay
    A physicist and an inventor, Jules Janssen (1824-1907) devoted his life to astronomical research. He spent many years traveling around the world to observe total Solar eclipses, demonstrating that a new era of science had just come thanks to the use of both spectroscopy and photography, and persuading the French Government of the necessity of founding a new observatory near Par...
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