At the peak of the Roman Empire's reach, around A.D. 117, the Empire stretched as far north as modern Scotland, stretched down through Europe east into Asia as far as the border between modern day Iraq and Iran, with its southern reaches extending into northern Africa.
<span>Copernicus posited a heliocentric or sun-centered conception of the universe; Kepler contributed the three laws of planetary motion; and Galileo's telescope led to observations of earth like planets rather than ethereal planets.</span>
