Topic Root Words Root Word 1. 2. 3. 4. Group: 4 Meaning luna sol helios stella astron terra geo moon sun star Earth land Space Key Word(s) lunatic solar heliocentric constellation astronaut territory geography, geometry Root Words Group 4 Space Words and Definitions Word Part of Pronunciation speech Meaning lunatic n. (ˈlo͞onəˌtik) parasol n. (ˈperəˌsôl) heliocentric adj. (ˌhēlēəˈsentrik) interstellar asterisk adj. n. (in(t)ərˈstelə) (ˈastəˌrisk) terrace n. (ˈterəs) geology n (jēˈäləjē) A person affected by the changes of the moon Insane; crazy a light umbrella used to give shade from the sun having or representing the sun as a center between the stars a star-shaped symbol (*) used to mark printed or written text, typically as a reference to an annotation or to stand for omitted matter an area or platform next to a building; a patio the science that deals with the earth's physical structure and substance, its history, and the processes that act on it