What's cooler than being an Internet entrepreneur? Making a living as a space entrepreneur.

A handful of space-age capitalists convened at the Techonomy conference in Tucson, Arizona this week to discuss the opportunities and challenges of the burgeoning field of intergalactic commerce.

Among the promising business opportunities waiting in the heavens: new and plentiful sources of energy, resource extraction, zero-gravity manufacturing, real estate and tourism.

“Going after an asteroid that’s the size of this room, that literally is a 30-meter long asteroid that has $15 billion worth of platinum rare metals, that’s going to happen someday,” said one of the panelists.

Within five years, predicted another, tourists will be able to take a voyage all the way around the moon.