Motion, forces, and energy | Physics | Khan Academy - Orbital motion | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:gravitation/x6679aa2c65c01e53:orbital-motion/v/orbital_motion Want to explore more? Check out the full gravitation playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HDc5mDKJgdF2NURZGXElO-5 Kepler's laws, along with Newton's law of gravitation, describe the motions of planets and other orbiting objects. Kepler's first law states that planets follow elliptical orbits around the Sun, with the Sun at one focus. Kepler's second law states that the line from the planet to the Sun sweeps out equal areas in equal times. Kepler's third law relates orbital period to distance from the Sun. Sections: 00:00 - Intro 00:27 - The Sun wobbles 01:33 - Elliptical shape of orbits 02:17 - Eccentricity and foci of an ellipse 03:51 - Seasons are NOT due to elliptical orbits 04:31 - Kepler's first law 05:11 - Planet's speed throughout an elliptical orbit 08:01 - Kepler's second law 10:31 - Kepler's third law 12:59 - Summary ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc