Stability of the Solar System is unlikely any of the planets will collide with each other or be ejected from the system in the next few billion years, and the Earth's orbit will be relatively stable. Since Newton's law of gravitation (1687), mathematicians and astronomers (such as Laplace, Lagrange, Gauss, Poincaré, Kolmogorov, Vladimir Arnold and Jürgen Moser) have searched for evidence for the stability of the planetary motions, and this quest led to many mathematical developments, and several successive 'proofs' of stability of the Solar System. The orbits of the planets are open to long-term variations. Modeling the Solar System is a case of the
The Planets had no such patriotic intentions when he originally composed the music, these adaptations have encouraged others to draw upon the score in similar ways throughout the 20th Century. The melody was also adapted and set to lyrics by Charlie Skarbek and titled "World in Union". The song is used as the theme song for the Rugby World Cup and appears in most television coverage and before matches. The Planets The Planets, Op. 32, is a seven-movement orchestral suite by the English composer Gustav Holst, written between 1914 and 1916. Each movement of the suite is named after a planet of