4 ms·

Given that there is no industry in space I'd guess none.

• mooreds 8y ago
  Well, there have been industrial experiments, which may have helped industry down here.
• abecedarius 8y ago
  I dimly remember that that book presumed launches would get much cheaper and more frequent. To be fair, before the shuttle flew there'd been inflated promises, and aerospace had progressed really fast in the preceding decades. It was a little like someone in 2000 thinking Dennard scaling wasn't about to hit the wall -- it's easy to think that was dumb in hindsight.