Stability of the Solar System essentially the distance from sun to earth). These are now known as the Kirkwood gaps. Some asteroids were later discovered to orbit in these gaps, but their orbits are unstable and they will eventually break out of the resonance due to close encounters with a major planet. Another common form of resonance in the Solar System is spin–orbit resonance, where the period of spin (the time it takes the planet or moon to rotate once about its axis) has a simple numerical relationship with its orbital period. An example is our own Moon, which is in a 1:1 spin–orbit resonance
Gustav Holst wrath. In 1912 Holst composed two psalm settings, in which he experimented with plainsong; the same year saw the enduringly popular "St Paul's Suite" (a "gay but retrogressive" piece according to Dickinson), and the failure of his large scale orchestral work "Phantastes". Holst conceived the idea of "The Planets" in 1913, partly as a result of his interest in astrology, and also from his determination, despite the failure of "Phantastes", to produce a large-scale orchestral work. The chosen format may have been influenced by Schoenberg's "Fünf Orchesterstücke", and shares something of the aesthetic, Matthews suggests, of Debussy's "Nocturnes" or "La