Wow! So many first time posters, some who have been members for months. Welcome to all of you! Obviously, this issue is important enough to get the lurkers to step forward.
As someone said, money is the problem. What we are spending on space exploration is mere pennies compared to what is spent on cosmetics in the United States every year. Cosmetics! Consider that the recent financial crisis saw over 1 TRILLION dollars disappear from the ledgers. The money is there, if we can find a justification for spending it.
Unfortunately, exploration is a poor investment, in the eyes of business investors, be it by robots or by humans. They want to see a return on their investment, something of value. This is why, in part, Mars is no nearer to having human visitors than it was 40 years ago. This is also why we have the International Space Station, in spite of the U. S. governments reluctance to fund it.
There is money to be made in space, lots of it. No one can say where, or how, but the ability to mix oil and water, to create metal foams, to grow huge crystals, these things promise that products will be identified which will have commercial value on Earth. THAT is what gets investors blood flowing faster, not pretty pictures of distant galaxies, or new data about black holes.
Somebody said that there is nothing of value on the Moon, because what is on the Moon is the same things that are on Earth. A recent issue of National Geographic described the mining of gold on Earth, at a pit mine in Indonesia. Extracting a single ounce of gold there requires removing 250 tons of rock and ore. This mine is expected to only last another 20 years before it is played out, while its operation is burying square miles of jungle under the waste materials.
We are in grave danger of extinction, but not by an incoming rock, but at our own hands. Only a small portion of the world’s population enjoys the standard of living the average American does, yet we already are dumping billions of tons of carbon dioxide into the atmosphere every year. What will the environmental consequences be of even one-half of the world’s population attaining the standard of living Americans take for granted?
Practically every one in this community of space advocates envisions traveling to other planets, colonizing the Moon, going SOMEWHERE. But space itself is likely to be our destination, for many years to come, because space, the weightless environment, is where the money is to be made. Raw materials from the Moon, asteroids, even Mercury will be needed, but those mines will be largely automated. Space stations in orbit around the Sun, enjoying uninterrupted power, will be where most humans are employed.
All of this development will necessarily require the creation of new space craft, launch vehicles, and other hardware, which will facilitate the exploration of our solar system. The huge cost of keeping humans alive in space will demand the creation of advanced robots, which will lead the way to Mars and other destinations.