The reality of space travel I think is somewhere in the middle. We will get there, it will be hard, it will take a long time, and in the end, the most extraordinary thing we will find when we get there will be ourselves.
I think the greatest danger of the promise of space travel is that it can lead us to be cavalier about the world we live on, if we assume we can find or make more worlds. I think in our lifetimes we surely will not, probably in the lifetimes of our great-great-grand-descendants we will not.
The more you learn about the real vastness of space and the real challenges of space travel, the more completely you appreciate the necessity of taking very good care of this world and being good stewards of it.
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