True, the one thing I keep trying to remind myself and other of is that we really don't appreciate the cosmic scale all that well. There's a point where it's a

True, the one thing I keep trying to remind myself and other of is that we really don't appreciate the cosmic scale all that well. There's a point where it's all just "big". A million and a billion seem equally big. Even though, as it has been said before, that the difference between 1 billion and 1 million is about 1 billion. There are so many fundamentally difficult problems with deep space exploration, that it may never be logistically possible to over come them. And that's of the ones we know about.