Creating a money-making rationale for private space ventures—be they public space travel, orbiting hotels, low-cost rocketry, a space junk collection service, or even a lunar power and light company—such enterprises must be grounded in first-order business basics. Over the decades, several entrepreneurial space firms have come and gone, their vision getting too far ahead of business reality, but there are encouraging signs that private space ventures are reinvigorating—as well as agitating and disrupting—customary models of space commercialization. That’s the message to be heard at Space Billionaires: Educating the Next Generation of Entrepreneurs, a Thought Leader Forum being held April 4...