One day when we tell the story of our lives we may refer to this time as "the year they discovered Gliese 581 g." It's the planet that orbits in the sweet spot of a red giant with temperatures that could support life. It could have an atmosphere, it might have water, it might have bacteria, it might have a whole ecosystem. We can't tell from this distance. The astonishing part is that it's tidally locked to its sun so that the same side of the planet always faces it, and part of the world is always left in shadow. The part that gets the direct sunlight is too hot and the shadow portion is too cold but there's a ring that in perpetual twilight and the temperature is perfect for human life.
I'm not terribly surprised; we've found planets with potentially livable conditions before. Alpha Centauri comes readily to mind. What surprises me is that no one seems terribly excited. We have found a new world--one that might support life. Our grandchildren may see the space ship built for its' exploration. Our great grandchildren may colonize it. It could be the beginning of our spread from one single rock floating alone in space to a series of connected worlds.
Mankind abhors a vacuum even more than space does. The thought of a life-supporting planet, unexplored and empty of humans, is intolerable. We must seek out fresh frontiers to save our civilization from stagnation. And in the long run, it’s essential for the survival of our species; not even our sun can last forever. Our travel beyond this solar system is inevitable; the only other option is extinction.
I think that the lack of enthusiasm for space exploration is borne from the myth that traveling beyond our solar system is a pipe dream—something so far beyond our grasp that humanity might not live to see it. True, we’re not there yet. We have mastered the theories necessary, but the application is too expensive.
There are many factors holding us back, but they are temporary. We cannot help but explore, eventually we will leave Earth and streak across the galaxy in the mad frenzy of animal released from a cage. How I envy those who will live to see it. If we had the craft now, ready to leave for a planet just barely prepared for human life, I know I would be on it.






