Some people wonder why we continue to explore other systems at all.  We have enough room on the worlds we’ve discovered to live on for thousands of years without crowding after all.  The vast majority of us never leave the world we were born on.  But there are always those who wonder what is over the hill, or on the other side of the sea, on another world, or at another star.  They are the people that want to see things with their own eyes.  They are the explorers.