[EDIT: The way I had initially described the distinction was misleading, as pointed out by thomblake. I apologize for potentially skewing the results of the poll, although I don't think my revised version is that far off from the earlier version. Still, I should have been more careful.]

Moral realism: There are objective moral facts, i.e. there are facts about what is right and wrong (or good and bad) that are not constituted by a subject's beliefs and desires.

Moral anti-realism: The denial of moral realism.