I dont see why that would cause an issue. While at it, it would be nice to have a motorcycle category as well..
I'll note though, that the "tags" that you apply will likely weigh more heavily into the types of searches that will yield your article in their results. Tagging "space" "moon" "lander" "Apollo", so on, will broaden the searches that people may make that will turn up your article.
A tid-bit of information that I hope helps.