I asked this question some hours ago, a question which turns out to be more complex and have more implications built into than is useful, so it was closed, that's fine by me. But then it was migrated, to the Space Exploration stack, 30 seconds due diligence shows that hypothetical questions are on shaky ground on Space Exploration and that this question in particular has no place whatsoever on the site as originally written (as written it's a better fit on the Astronomy stack and off-topic even there).
A suggestion had been made, and acknowledged by me, that there might be a case for posting a question on the same topic to Space Exploration and I indicated that I would investigate that possibility once the post had been up for 24 hours so the whole community had a chance to see it and maybe answer it as by then a couple of suggests had been made already. I've been led to believe that it is the polite way to handle things once a post is up and has answers; to let it be for at least a full day before doing something as drastic as closing it myself. I intended to check the parameters of Space Exploration and see what parts, if any, of the question were site compatible and proceed accordingly. I signed back in to find that the question had been migrated and a glance at the "what can I ask" section of its new home tells me it shouldn't be there, at all. Furthermore I'm stuck with it because it's still carrying the answers it got on this stack to spite them both being deleted by their authors on this stack.
I don't object to the question being closed, it was bigger and less useful than I thought it was, I don't object in general to the idea of questions being migrated. In this case however the question has been put even further at odds with the policies of the stack it is on than it already was because it was migrated into a space that deals almost exclusively in established science rather than hypothetical questions.
So would it not be A. prudent to check the parameters for questions on the sites we're migrating material to, especially in light of the fact that we work with a lot of hypothetical material that is completely off-topic elsewhere in the network? And/or B. when a question needs to be closed but the topic may be answerable elsewhere on the network tell the OP that and let them decide how much, if any, of that question they want to put on another site?