Abundance of the chemical elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets of the Solar System have undergone an additional depletion of volatile hydrogen, helium, neon, nitrogen, and carbon (which volatilizes as methane). The crust, mantle, and core of the Earth show evidence of chemical segregation plus some sequestration by density. Lighter silicates of aluminum are found in the crust, with more magnesium silicate in the mantle, while metallic iron and nickel compose the core. The abundance of elements in specialized environments, such as atmospheres, or
Journey to the Centre of the Earth (album) earned Wakeman a nomination for an Ivor Novello Award and a Grammy Award for Best Pop Instrumental Performance. In 1999, Wakeman released a sequel album "Return to the Centre of the Earth". After the original score was presumed lost, Wakeman was reunited with it in 2009 and re-recorded the album three years later with 18 minutes of music previously cut due to time constraints. By mid-1973, Wakeman had been with the progressive rock band Yes for almost two years, and he had released his debut solo effort, "The Six Wives of Henry VIII", to critical acclaim. For his next release