TNO = trans neptunian object, basically far out dwarf planet
Obviously there would be less sun to greenhouse, but theoretically could that be a way to have closer-to-earth habitats far away from a star?
edit: the TNO does not have to be like Pluto, it can be bigger or have different conditions
How about a space station? Lot easier to keep things livable if you just contain everything. Would probably end up being easier to build a station and fly it out there than try to terraform something that distant.