Alan M. MacRobert became an avid Sky & Telescope subscriber in 1966, joined the editorial staff in 1982, and is now a senior editor, semi-retired. He has played a role in practically every part of the magazine and its products for a generation and a half, both on the amateur-observing side and the science-reporting side. In 1994 a book collection of his observing how-tos and telescopic sky tours was published as Star Hopping for Backyard Astronomers.

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Image of Charles Rudolph

Charles Rudolph

October 20, 2017 at 6:13 pm

Mr. MacRobert,

I am puzzled that you always refer to 40 degrees north as New York rather than Philadelphia. According to Google Maps, New York is closer to 41 degrees north while the 40th parallel passes through Philadelphia.

I live in Moorestown, NJ; a Philadelphia suburb; and Google Maps indicates that the 40th parallel and 75th meridian intersect within the grounds of Riverton Country Club; about 3.72 miles from my home.

I enjoy reading your "Sky at a Glance" each week. Keep up the good work.

Charles Rudolph
chasrudolph@hotmail.com

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