Eventually, while researching, you'll learn something you didn't want to know. Some fact that ruins a plotline you had in mind. The good news is that sometimes, learning all the facts can make for a much more interesting story than you originally had in mind.

Designing a station with artificial gravity would undoubtedly be a daunting task. Space agencies would have to re-examine many reliable technologies under the light of the new forces these tools would have to endure. Space flight would have to take several steps back before moving forward again.

If someone offered me a free trip to the International Space Station, I would decline. I like Earth. I like the internet. I like Diet Coke. I have cats. I write about brave people - I'm not one of them.

Research into manned spaceflight is shifting from low-Earth orbit to destinations much further away, like Mars and the asteroid belt. But society will have to invent many new technologies before it can plausibly send people to those distances.