Langbeschreibung
With the upcoming total solar eclipse of 2017 August 21, certain questions naturally arise as to the frequency of these events. When was the last total eclipse through the USA and when is the next? How often do they happen? What total eclipse tracks passed across the USA during the 17th, 18th, and 19th centuries, etc., and what states did they include? And how often is a total solar eclipse visible from each of the 50 states?