Twice in the last 24 hours I have rolled back edits that the OP has made to their own question, because the nature of the question was completely changed or substantial supplementary questions were added.
How to convert ra&dec between different epoches?
I think such edits are fine when no answers to a question have been advanced, but in both these cases, I had given a substantial answer that had received upvotes and in one case been accepted.
Please could question askers not do this, it makes existing answers look ill thought-out, incomplete or even irrelevant. If you have a different question, ask a different question.