ɪnðə fˈɑːloʊɪŋ sˈɛkʃənz, wiː ʃˈoʊ ðæt ðoʊz tˈuː fˈoːɹs lˈɔːz pɹədˈuːs stˈeɪbəl, ɛɡzˈæktli klˈoʊzd ˈɔːɹbɪts ɐ səfˈɪʃənt kəndˈɪʃən
In the following sections, we show that those two force laws produce stable, exactly closed orbits (a sufficient condition)