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Winter Solstice

Started by heliophile, 12/21/2007 11:44PM
Posted 12/21/2007 11:44PM Opening Post
I remember reading somewhere that the sun rises at a later time for a few days after sunrise, but overall the days are still longer because of the sunset making up for the difference and more. Is this true? If so, how could the sun actually rise later?

Rey
Posted 12/22/2007 12:11AM | Edited 12/22/2007 12:11AM #1
Rey, in your first sentence you write "the sun rises at a later time for a few days after sunrise"....

This isn't what you meant to say is it? I think I know what you are talking about. Although the solstice is the shortest day, sunrise on the solstice is not at its latest point. This is true, and is a consequence of our elliptical orbit and related changing orbital speed, and the tilt of the ecliptic relative to the celestial equator. The latest sunrise for mid-latitudes in the northern hemisphere occur around the middle of January. A good link for more detail is

http://www.dlmcn.com/eqntime.html

This is kind of tough to get your mind around!

Steve