Terrestrial planet Terrestrial planet A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, i.e. Mercury, Venus, Earth, and Mars. The terms "terrestrial planet" and "telluric planet" are derived from Latin words for Earth ("Terra" and "Tellus"), as these planets are, in terms of structure, "Earth-like". Terrestrial planets have a solid planetary surface, making them substantially different from the larger giant planets, which are composed mostly of some combination of hydrogen, helium, and water existing in various
The Planets the suite and that the movements on either side are in mirror images. Thus Mars involves motion and Neptune is static; Venus is sublime while Uranus is vulgar, and Mercury is light and "scherzando" while Saturn is heavy and plodding. This hypothesis is lent credence by the fact that the two outer movements, Mars and Neptune, are both written in rather unusual quintuple meter. Holst suffered neuritis in his right arm, which caused him to seek help from several amanuenses in scoring "The Planets". This is clear from the number of different hands apparent in the full score. Neptune was