noun. Maybe they're attracted by the space junk.
Real citation: "@badbanana Yeah, you do it up there and you're an astronaut, down here and you're a hobo...stronaut. (Hmm, I may have a tv show pitch here.)"
(July 31, 2009, John Lynch, Twitter, http://twitter.com/jtlynchjr/statuses/3059751012)
Made-up citation: "Why did I become a hobo-stronaut? Well, sometimes you have to make a compromise between your own dreams and what your parents want you to be."