Sophie and the Scoundrels (Sophie Series, Book 3)

Sophie, NASA captain extraordinaire, and her friends are all part of an elite expedition. In order to save the world (and their science grades) they are called upon to build an elaborate space station. Sophie, however, realizes building that space station is only a small solution to a much bigger dilemma. Will she be able to complete her entire mission, saving the planet, before her whole world falls apart?