Birthdate: December 8, 1795

Sun Sign: Sagittarius

Birthplace: Tonder, Schleswig, Denmark

Died: March 28, 1874

Born to a goldsmith, Peter Andreas Hansen had initially learned the art of watchmaking. However, his skills as an astronomer eventually earned him the post of the director of the Seeberg Observatory near Gotha. His best-known works are related to optics, probability theory, and the motion of the Moon.