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Variation in Time of Sunrise through the Year

In January 1989, I wrote a short note to explain why the latest sunrise occurred later in the year than the shortest day. An enquiry about this phenomenon to the "Last Word" column of the New Scientist in 1997 prompted me to reformat the note as a WWW document. I added later the effect of the Earth's orbit eccentricity.

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Revised August 31, 1999