Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn about Kepler’s 1st Law of planetary motion: Elliptical Orbits. Kepler realized and proved that planets orbit around the Sun in elliptical orbits and the sun is located at one of its foci of the ellipse. (Part 2 of 3) Previous video in this series can be seen at: • Astrophysics: Binary Star System (23 of 4... Next video in this series can be seen at: • Astrophysics: Binary Star System (25 of 4...