Original: Christiaan Huygens , FRS ( , ; 14 April 1629 8 July 1695 ) was a prominent Dutch mathematician , astronomer , physicist , horologist , and writer of early science fiction .
Simplified: Christiaan Huygens ( April 14 , 1629 -- July 8 , 1695 ) was a Dutch physicist , mathematician and astronomer , born in The Hague .