Centauri Dreams: Imagining and Planning Interstellar Exploration - Paul Gilster - Google Books

https://books.google.de/books?id=L4fffd3SivkC

Why, today, would anyone undertake a plan to launch a spacecraft some 30 years in the future, and on a journey that would take some 40 years to complete? Paul Gilster investigates the science, and the spirit, of the NASA and JPL researchers who are…