From astronomers to futuristic dreamers, the inter-stellar space is the real frontier--for many centuries already.
Anyone who's looking at the firmament on a clear summer night is likely to agree. There is a "world" of stars, planets, moons, galaxies, and a host of other -- mostly unfathomable -- objects out there. One can't deny that.
However, is that a "good enough" reason to spend mega-bucks on trying to "conquer space?"