Why do astronauts feel heavy after take-off? Why are rockets long and thin? How do spacecraft orbit Earth? Covering lots of different aspects of space exploration, including looking at how spacecraft such as rocket launchers, satellites and space stations work and more human questions such as why astronauts need to keep so physically fit and what kit they need in their spacesuits, Fly to Mars! takes a fun look at forces in space. While learning about forces you will find that you also find out the answers to many questions that you have asked yourself about astronauts and space, and more. This Feel the Force series shows how forces and motion work in the world around us, in a set of high-interest situations. Each book includes three simple activities or investigations for readers to try. Overlays over large photos, plus diagrams, show how forces are acting in a given situation. Topics covered in the series include basic pushes, pulls and friction, air resistance, gravity, mass, weight and springs.