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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Science & Engineering
Cosmology & astronomy
Earth geological and climatic history
Earth's rotation and tilt
Apsidal precession (perihelion precession) and Milankovitch cycles
Apsidal precession (perihelion precession) and Milankovitch cycles
Apsidal Precession (Perihelion Precession)
License: CC BY-NC-SA by Khan Academy