Space architecture of space and a space transportation infrastructure can be accelerated. Virgin Galactic has indicated plans for an orbital craft, SpaceShipThree. The demand for space tourism is one without bound. It is not difficult to imagine lunar parks or cruises by Venus. Another impetus to become a spacefaring species is planetary defense. The classic space mission is the Earth-colliding asteroid interception mission. Using nuclear detonations to split or deflect the asteroid is risky at best. Such a tactic could actually make the problem worse by increasing the amount of asteroid fragments that do end up hitting the Earth. Robert Zubrin writes:
Space Tourism Society provide the vision and voice for the evolution of humanity off-world in a humane, fun, and beautiful direction. STS was created to inspire people to build real products for future use in space. , the president of the society, John Spencer, is designing a space yacht aimed for cruising in Earth orbit. Space Tourism Society The Space Tourism Society (STS) was founded in 1996. It is the first organization specifically focused on the space tourism industry. Their stated goals, quoted from their website: "To conduct the research, build public desire, and acquire the financial and political power to make space