Photo of the West Virginia Historical Marker near the end of the Mason-Dixon Line Survey, about 70 miles south of Pittsburgh. America's most famous boundary line [separating Pennsylvania from Maryland & Virginia (now West Virginia)] which was produced with the assistance of Astronomy, the 250th anniversary of the conclusion of the Mason-Dixon Line Survey will be on October 18. However, the Native American guides of Astronomers Charles Mason and Jeremiah Dixon refused to enter the territory of their Indian enemies; hence the Mason-Dixon Line Survey ended about 23 miles short of their goal: the southwest corner of Pennsylvania. In 1784, Philadelphia clock-maker and Astronomer David Rittenhouse, with surveyor Andrew Ellicott, completed surveying those last 23 miles.
A celebration of this 250th anniversary will occur at the Mason-Dixon Historical Park in Core, West Virginia, during the weekend of October 14 and 15. More information on the celebration:
Link >>> http://md250.exploretheline.com/
(Image Source: Amateur Astronomer Pete Zapadka)
Astronomical Calendar for 2017 October:
Link >>> http://buhlplanetarium4.tripod.com/astrocalendar/2017.html#oct
Related Blog Post ---
"Astronomical Calendar: 2017 September." 2017 Sept. 1.
Source: Friends of the Zeiss.
2017 October 1.
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