Each "Eyewitness Visual Dictionary" provides access to a 3000-word specialist vocabulary, actually showing what a word means by using photographs and illustrations. In "The Visual Dictionary of the Universe" a series of dramatic maps and photographs from the latest US and Russian probes chart the universe and explain its mysteries. Specially commissioned photographs of the telescopes and spacecraft used for exploration are also presented in the large format pages. This dictionary covers such topics as galaxies; the constellations; the solar system; asteroids; telescopes; and space exploration.