SUB-SOLAR POINT ON EARTH


(to update, reload page)
Courtesy: Fourmilab Switzerland

At any instant, Earth's SUB-SOLAR POINT is the point on our globe "directly under the Sun."  Expressed another way, it is "where the Sun appears directly overhead."  Always changing, this point circles the globe once a day.  In addition, once each year it gradually migrates north and then south over the equator, its yearly northernmost and southernmost limits respectively defining the Tropic of Cancer and the Tropic of Capricorn.  In the image above, the sub-solar point is plotted at the instant that this page loaded.


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