by Brian Williams (Author)

You don't know that much about mathematics and physics. You don't understand everything about rockets, satellites, or interplanetary flights. But you dream of flying to other planets and want to know everything needed to do it. You want to understand the principles of rockets and spaceships. You want to know why extraterrestrial space stations are needed and why studying other planets helps us understand our Earth. This book simply and clearly answers these questions and much more.