It's been nearly 45 years since humans first set foot. The of that era would likely be quite disappointed to know that we still have yet to press much farther into our solar system.
Sure, we've got-- if Mars had area codes -- but it still doesn't feel quite the same as setting human eyes on alien territory. Of course, private and NASA efforts to land humans on the red planet are under way, but why stop there?
In the interests of long-term planning, I've compiled a gallery of the top 10 places in our solar system that are intriguing and -- at least theoretically -- hospitable enough for a manned visit.
Once we've surveyed all the available real estate, maybe we can start talking colonization. Click through the slideshow below for the details on the most interesting destinations in our solar system, and then start packing your great-grandchildren's bags for their trip to the Kuiper Belt.