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
Brook Green Suite written in 1933, which has full enharmonic relations but remains austere. The final movement, the Dance, is based on a melody heard by Holst while in Sicily. The piece also originally contained a fourth movement, a Gavotte, which was removed after the first informal performance in 1934, the last concert Holst attended. In early 1929, Holst heard a tune during a puppet show and he utilised it in the last movement. Brook Green Suite Gustav Holst's Brook Green Suite, H. 190, was written in 1933 for St Paul's Girls' School junior orchestra for strings and consists of 3 movements. Holst