The Cause of Earth’s Seasons

Earth’s Revolution Around the Sun. tropical year: ~365.25 days . elliptical orbit. earth’s orbit around the sun is an ellipse, not a true circle. distance from sun varies throughout the year. perihelion: point in its orbit at which the Earth is closest to the sun. Jan 3. 91,455,000 miles. aphelion: point in its orbit at which Earth is ... ................
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