GOES satellite sees Earth at equinox

Earth's 23.5-degree tilt almost always ensures that the northern and the southern halves of our planet get unequal amounts of solar energy, with longer nights in winter and bigger stretches of sunlight in summer. Twice a year, however, both hemispheres get equal amounts of light, with equal intervals of day and night. That's what's known as the equinox.Just such an event at 7:02 a.m. ET on Wednesd...

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