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) Journey to the Centre of the Earth (album) Journey to the Centre of the Earth is the third album by English keyboardist Rick Wakeman, released on 3 May 1974 by A&M Records. It is a live recording of the second of his two concerts at the Royal Festival Hall on 18 January 1974, the premiere of his 40-minute orchestral rock piece based on Jules Verne's science fiction novel of the same name. It tells the story of Professor Lidenbrook, his nephew Axel, and their guide Hans, who follow a passage to the Earth's centre originally discovered by Arne Saknussemm, an