Why Isn't The Earliest Sunset On Dec. 21?

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By By Steve Pool

SEATTLE - Have you noticed that the sunsets stop getting earlier a week or so ahead of the "shortest day of the year" on or around Dec. 21 -- the day you'd think would have the earliest sunset?

The answer is that our way of keeping time assumes constants that aren't exactly constant. Earth's path around the sun isn't a circle, it's an ellipse. We orbit faster around the sun in winter when we're closest, and slowest when were furthest away in summer.

These little changes mean the sun is not at its highest point in the sky when we say it's noon -- it can be off a few minutes.

Check out this article below for even more details -- imagine.gsfc.nasa.gov

Your Photos

YouNews 12th  Man tree 12th Man tree
Left our tree up and redecorated for the Superbowl, GO HAWKS!
YouNews Seahawks Logo seen in the clouds Seahawks Logo seen in the clouds
Photo taken on 01-20-2015. My brother and I decided to get out of the house and go stretch our legs at picnic Park in Seattle and we were sitting on the shore watching the sun start to set and we saw the Seahawks logo appear over the Puget Sound and I started photographing it.