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Happy Restart of the Earth’s Tropical Orbital Period!

January 1, 2013

The year, of course, is the time it takes for the Earth to go around the Sun, right? Well, not exactly. It depends on what you mean by “year” and how you measure it. This takes a wee bit of explaining, so while the antacid is dissolving in your stomach to remedy last night’s excesses, sit back and let me tell you the tale of the year.

Excerpt from an article written by Phil Plait at Bad Astronomy, SLATE. Continue HERE

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