February 19, 1473 – #ThisDayinHistory: In 1473, Nicolaus Copernicus was born, and later become the man who identified the concept of a heliocentric solar system: the sun, rather than the earth, is the center of the solar system. Copernicus became a symbol of the brave scientist standing alone, defending his theories against the common beliefs of his time- his work significantly contributing to the Scientific Revolution. #ProgressIsPossible