Astronauts have chosen one of the most extreme science careers imaginable! Readers explore the training necessary before astronauts can go into space, and they also discover the stories of real astronauts. The engaging and informative main text is accompanied by a detailed graphic organizer, eye-catching fact boxes, and vibrant photographs. Readers learn the many ways astronauts use science, technology, engineering, and math in order to do their jobs. Science curriculum topics under the umbrella of STEM are presented to readers in a fun way that shows them the most extreme facts about a truly out-of-this-world career.