Ok--here's a real and practical use of space that could begin right now and have actual payoffs:
- Establish a permanent space station at a LaGrange point between earth and the moon.
- Begin creation of a moon base.
- Build an orbital fleet of construction, crew, cargo, tug and tanker vessels to service all orbital facilities and activities.
- Begin asteroid surveys with the goals of identifying mineable commodities such as rare elements and ice for fuel and oxygen, cooling and power.
- Begin deployment of massive microfilm solar cell sheets to provide energy for microwave transmission to earth and orbital power facilities and propulsion lasers for asteroid cargo vessels.
If you started this process (because sooner or later we have to "do" something for anything to start), you would begin the creation of a new global growth industry. The potential wealth in the asteroids is staggering. Blowing holes in mountainsides and gouging a crater or sending people two miles underground in a toxic environment to get precious metals and rare elements on earth could be done in space and the minerals there are much easier to get to.
The solar arrays could also be used as solar sails using earth and moon orbital lasers to send a steady stream of containers and equipment towards the asteroid belts.
The moon base could rapidly be made near self sufficient once this was up to speed and provides a low gravity (cheaper to orbit and de-orbit) crew way station to offset zero-g bone and muscle loss and to provide some R&R.
The microwave power generation is already technically doable and the capacity and ease of construction now of solar cells has exponentially exploded just in the past five years. There are cells with higher than 50% efficiency and ones that can be printed onto paper or housing tiles by an ink press (just like a newspaper).
There are power generating waste atomizers already used on earth that could use solar power to reduce orbital debris and actual human waste could be "dropped" on the moon after a solar sail nudge fom orbit.
Zero-G facilities might help engineer breakthroughs in fusion research making it viable on the moon and especially on earth and the moon provides a low grav research facility "on the ground as well.
The orbital facilities aren't "Star Trek"--most of them can be inflatable baloons and metal graphite frames. A Cargo carrier could be simply metal crates or even a cargo net.
One large ice bearing body in the asteroid belt could provide fuel, air and water for the entire operation there allowing actual rocket boosted flight to and from earth.Ion engines are dirt cheap and practical as well and would do wonders for getting containers back and forth to all locations.
On this scale, a real industry is created--generating efficient mass production opportunities for everything needed and improving education in the working populaces. Technological breakthroughs and new products and services are a given.
We're talking about an investment in some booster rockets, fuel, metal tanks, aluminum and graphite frames and silicon to get started. It's a joke that it hasn't already begun and it doesn't because people stare at their problems and think "We can't do that! it will be expensive!". "What about the poor and hungry and people here!?". They do this instead of realizing it would finance improving the entire planet and reduce the economic, ecological and eventually possible even population pressures on it.
It also positions us to actually be able to see and do something about possible impact bodies before they get here and the science alone coming out of this would be staggering.
The real problem is it takes long-term, funding, multidisciplinary planning, courage by politicians and some money up-front. Add up all the world stimulus and bail-out packages from the economic crisis and you could have paid cash up front and covered the first ten years of development of all this with no need for profit at all during that time.
Instead, now its just pissed down the drain.
It would put business in space. Creating virtual space on the internet has created a whole new global economy and the only real long term business growth in some time (and helped prevent an immediate economic depression globally). Imagine what opening up actual space with tangible resources would do.
We need things to make people think along these lines so that politicians and companies can have the support to begin them. Programs like SETI (or more practical ones like the Hubble) help do this.