The planet Golarion has its own moon, Somal, which has only one side visible. Many Golarion scientists argue about what is on the mysterious dark side of the moon - maybe you have an idea too? http://pbs.twimg.com/media/FJYgyiuXoAAXYfH.jpg
An Agri-World is one devoted to food production. The majority of its surface is given over to producing food for other worlds reliant on such imports - the food itself forms part of the planet's required tithe. http://pbs.twimg.com/media/FmwNT1FWYAAXHxJ.jpg