The term 'Earth Bound' can be solved by the crossword solution 'ATLAS'. This is a reference to the Greek Titan of the same name, who was tasked with holding up the sky and the celestial spheres. In modern times, the term 'ATLAS' has come to refer to any collection of maps or charts, as well as a book of maps. In this context, 'Earth Bound' could refer to the fact that the maps are limited to the Earth, or that they are bound in a book.