Christian Andreas Doppler was born in Salzburg, Austria, on November 29, 1803. His father was a stonemason, and he was expected to join the family business, but due to his poor health condition, he persuaded academics. He graduated in physics from the Polytechnical Institute of Vienna in 1825 and later, he went to the University of Vienna to study mathematics, machines, and astronomy.[1] At the end of his study, he has worked with Professor Burg for 4 years and in 1831, he published his first paper “A contribution to the theory of parallels.”[1] Unfortunately, for many years, he failed to get an academic position, so he supported himself by working as a bookkeeper at a cotton factory near the city of Bruck. He was disappointed and decided to move to the USA where he was offered a position as a professor at the Technical Secondary School in Prague and later at the polytechnic school. In 1836, he married Mathilda Sturm and together the couple had five children.