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,
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