mattock: a kind of pick that is used for digging; has a flat blade set at right angles to the handle
pick: a heavy iron tool with a wooden handle and a curved head that is pointed on both ends
planet: (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction