As we progress and our technology is revised and reinforced, our lust for expansion, for exploring, and for learning can be sated with exploration into space. Companies such as Space X and Blue Origin have resurrected this possibility after the decline of NASA and could indeed lead to exploration of nearby planets, discovery of more exoplanets, and allow for a more in-depth study of this foreign environment.
As Carl Sagan put it "The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand." We should remember that this exploration is not something that will be able to go by in a blink, rather it will take a long period of time as long as we continue to fund these studies and support them.