The US space agency has brought in a second billionaire to help it return astronauts to the moon. NASA is already working with Elon Musk’s SpaceX on a launch system based on its new Starship rocket, which will land as early as 2025. It has also now awarded Amazon.com founder Jeff Bezos a contract to build a lander to take a crew to the lunar surface later this decade. His company, Blue Origin, will produce a more conventional-looking vehicle. Mr Bezos will have help from some established names in the US aerospace sector, including Lockheed Martin, Boeing, Draper and Astrobotic....