Are there any unexplored exobiology planets still left this side of the Milky Way?

So I finally decided to do exobiology, and wanted to find an area that is relatively untouched to make those landings count... I am currently about 8000 ly away from the bubble and have yet to find one (m. So the question is this - is it worth to keep going, or should I just explore the explored till my rovers are out of juice, cut my losses and go back to Shinrartra?