As long as a project can be traced back to an ancient culture that studied astronomy or a culture found in the HP world, no matter how remote the connection is, it will fit into astronomy this month.
Specific cultures mentioned in the class description or approved in the class thread:
Persian - modern day Iran
Indian - Indian subconteninet, not Native Americans
Not allowed are fictitious cultures, such as Atlantis.
We can knit, spin, or crochet anything that fits into any of these cultures
Bonus points will definitely be awarded to anyone who attempts to interpret the Antikythera mechanism in fiber form, but otherwise no other specific bonus points have been mentioned.
The professor is looking for a good story for this class, so hopefully this list helps to jog your noodle.