Reusable rockets and mass production of spacecraft and their components mean that the cost of access to and operation in space is dropping rapidly and making ever more space businesses economically viable. There are now already thousands of space start-up companies. The space economy is expected to grow to several trillion dollars over the next decades. Space technology may help solve challenges on Earth, ranging from climate change over food and energy security to quality healthcare. This book, written by renowned space investor and educator Raphael Roettgen, explains these trends, the implications for all of us, and how each and every one of us can be part of this exciting sector, whether as a pioneering entrepreneur or a space tourist.