Jeff Bezos already had the money and the motivation to build Orbital Reef. Now he also has a rocket to make it happen.

Jeff Bezos' Blue Origin space company is one of them, and its Orbital Reef space station is expected to cost $100 billion. Jeff Bezos already had the money and the motivation to build Orbital Reef.

And while neither Orbital Reef nor Bezos' Blue Origin are public stocks you can invest in, the company leading one of these other space stations, Voyager Technologies, soon may be. The Wall Street ...