Two years ago, when I did this short film, more than 400 new planets had been discovered. Since then, the number has doubled. A handful of them seem to have water, and as such, the possibility of life. But when and how can we ever cross the vast gulf of space that separates Earth from these strange new worlds? The challenge is staggering. This short video essay, which I've written and edited and narrated, uses animation from NASA and illustrations from artist Ron Miller to disclose these difficulties, and suggests some possible solutions.