fix-the-spade said:
The Rogue Wolf said:
(or at the very least, find resources from beyond it)
This may be overly negative of me, but mining other planets or celestial bodies has always struck me as a spectacularly bad idea.
Every so often the odea of mining the moon springs up. Which begs the question, has anyone considered the possible effect of altering the moon's mass? Obviously initially the effect would be negligible, but given our species' habit of strip mining everything it would be worth considering the eventual consequences of reducing the mass of out nearest large rock whilst increasing the mass of our own.
What affect would it have on weather patterns, tides, would it alter it's orbit, would it even decay it's orbit? If we're going to try it it's worth thinking about very hard.
First, the moon is larger than it looks. If we get to the point where we can affect the moons mass in any significant way, we'll also be able to deal with any consequences.
Second, no one wants to ship ore back to Earth. Getting mass out of a gravity well is expensive, and cargo space is limited, so the ore will be processed on site, and you can expect at least 80% of the material excavated to stay on the moon.
Third, the countries of the world have an interest in not bringing the moon down on them, and they employ large groups of people with lots of powerful computers that track and predict the behavior of celestial objects. The moon will be one of those. In the time it takes to make any difference at all on the moon's mass, the problem will have been exhaustively studied every year for however many centuries it will take.
Fourth, you should consider the number of large impact craters on the moon. Each of the larger ones excavated far more material than we are likely to, blasting a lot of it into space, and imparting a significant amount of force to the moon as well, which mining would not do. You'll notice that neither the alterations to the moon's mass, positive or negative, nor the impulse from those impacts has managed to dislodge the moon from its orbit around Earth in 4 billion years. Consider also that the rate and size of impacts was greater in the early days of the moon, and there were likely impacts on the moon far greater than any we see evidence for now, that have since been covered up by later impacts or lunar volcanic activity (the dark portions of the moon are basaltic lava flows; the moon had active volcanism for a time).
If you take this scenario to planets, then you may as well wonder if pouring a glass of water in the ocean will cause another tsunami.
I think you are not being overly negative, but you are vastly overestimating the impact that humans can have on certain systems.