A thorough explanation and analysis of the most commonly discussed options for the immediate future of space exploration. This comes at a critical time in our space program, as the nation and the world considers its next step: space stations? Space colonization? A mission to Mars? Manned or un-manned? Do we use space for military advantage? Running through the book will be a 'roundtable discussion' quoting or excerpting nationally prominent thinkers in the field.