Danish astronomer who produced the initial quantitative measurements from the speed of light in 1676. He graduated in the Cathedral college of Aarhus in 1662 and attended the School of Copenhagen. He was produced the Second Key from the Copenhagen Law enforcement in 1705 and continued to be in the positioning until his loss of life in 1710. He was created to product owner and skipper Christen Pedersen and Anna Olufsdatter Surprise. He discovered mathematics and astronomy using Tycho Brahe’s astronomical observations.