1. Introduction, 2. The Rise, Stagnation, and Possible Revitalization of NASA, 3. Building on Winning the Ansari X Prize: Mojave Aerospace Ventures, LLC; Scaled Composites, LLC; Virgin Galactic Airways; and The Spaceship Company, 4. From Space Travel Broker to Joint Venturer: Space Adventures, Ltd., 5. The Quest to Reduce Launch Costs: Space Exploration Technologies Corp., 6. Developing Space Habitats: Bigelow Aerospace Inc., 7. The Legal Environment for Private Sector Space Enterprises, 8. Conclusion, Index