The 365 Days of Astronomy Space Stories - Perihelion & Aphelion
Hosted by our Director, Avivah Yamani.
Earth swings closest to the Sun at perihelion and farthest at aphelion, words that apply to every planet orbiting the Sun. Learn how Kepler's laws reveal an elliptical orbit, why Earth moves faster at perihelion, and why seasons come from Earth's tilt, not distance.
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The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu
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