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
Gustav Holst opera, "At the Boar's Head", followed; neither had the immediate popular appeal of "A Moorside Suite" for brass band of 1928. In 1927 Holst was commissioned by the New York Symphony Orchestra to write a symphony. Instead, he wrote an orchestral piece "Egdon Heath", inspired by Thomas Hardy's Wessex. It was first performed in February 1928, a month after Hardy's death, at a memorial concert. By this time the public's brief enthusiasm for everything Holstian was waning, and the piece was not well received in New York. Olin Downes in "The New York Times" opined that "the new score seemed