Terrestrial planet from the original solar nebula. The Solar System has four terrestrial planets: Mercury, Venus, Earth, and Mars. Only one terrestrial planet, Earth, is known to have an active hydrosphere. During the formation of the Solar System, there were probably many more terrestrial planetesimals, but most merged with or were ejected by the four terrestrial planets. Dwarf planets, such as Ceres, Pluto and Eris, and small Solar System bodies are similar to terrestrial planets in the fact that they do have a solid surface, but are, on average, composed of more icy materials (Ceres, Pluto and Eris have densities of 2.17,
Suite (music) dexterity from the pianist. Arnold Schoenberg's first use of the twelve-tone technique throughout an entire work was in his Suite for Piano, op. 25. Modeled on the Baroque keyboard suite, the piece consists of six movements entitled "Präludium" (Prelude), "Gavotte", "Musette", "Intermezzo", "Menuett" (Minuet, with Trio), and "Gigue". Other famous examples of early 20th-century suites are "The Planets" by Gustav Holst, a 'Suite for Orchestra' in which each piece represents the astrological significance of one of the seven uninhabited planets then known, as well as his First Suite in E-flat and Second Suite in F for Military Band. There are