On Kepler-22b and space travel

Over two weeks ago, it was announced that the first Earth-sized planet located within the habitable zone of a star the same type as the Sun (both are class G stars) had been discovered. Currently, it is still not known if Kepler-22b is rocky, liquid, or gaseous...it could be a place completely hostile to life, but even so, the discovery of a planet both similar in size to Earth and a similar distance from its star as Earth is to the Sun is fascinating and important: I have always been interested in extrasolar planets and space travel.

The only thing that does disappoint me with the discovery of thousands of planets outside the Solar System, especially the ones capable of supporting life (we may not have found them yet, but we will), is that we will not be able to visit them. If it is confirmed that Kepler-22b can support life, being 600 light-years away it would take 600 years to get there just at light-speed (technology that humanity does not possess at present). Even our closest star besides the Sun, Alpha Centauri, would take four years to get to at that speed. The Moon is the only place outside Earth that humans have been to so far, and I am enthralled by that, but saddened that we have not gone to it since the 1970s.

While humans are unlikely to be able to personally travel to extrasolar locations for the foreseeable future, at least we have plenty of places within the Solar System itself to visit long before then. Granted, I doubt I will be able to visit a base on Pluto (although I would be delighted to), but I remain optimistic, even with cuts to space programs, that in my lifetime trips into space (and possibly the Moon) will be commonplace and Mars will have been visited by humans

I strongly think that one day humanity will be able to travel to these distant places and beyond. In the meantime, I also think it is important to care for and protect our current residence in the Universe: the Earth.