@Brandon9000,
Brandon wrote:God in Heaven! No one has seriously believed for a long time that anyplace else in this solar system is inhabitable by humans.
Correctly so. Any place in the solar system outside of Earth continues to be uninhabitable.
Unless, of course, if we bring our own little mini-Earths to those places, which is what we did with our rockets and the space station. But why set up mini-Earths throughout outer space when we have a perfectly fine Earth right here?
Brandon9000 wrote:What about the trillions of other solar systems???
Unreachable given our current life expectancy and the known laws of physics. The astronauts would either die of old age before they get there, or they would be quashed by the acceleration necessary to get them there sooner. Of course, some day we might figure out how to extend our life expectancies into the millenia. Also, the laws of physics as we know them could someday prove incomplete or even wrong. If and when that happens, we can talk. Until then, however, I'm in the robots-in-space camp but not in the humans-in-space camp.
Brandon9000 wrote:What about the possibility of other civilizations out there among those trillions of worlds?
They're an exciting possibility. If NASA wishes to build a radioastronomic equivalent of Hubble to contact them with less EM interference, I'm all for it. Maybe they can even build it with an integrated chat server where we can meet the aliens online. On the other hand, trying to meet up with them
in person would be a waste of time in my opinion. As I said, wherever they are, they're too far away for that.