I used my one and only decent photo of the moon and made it into a brush. It actually looks better in color, as a brush, than it does in its usual moon colors. I didn't know how to fix that, but I sure had fun learning how to do this and playing around. Thank you for this awesome class, Helen!
Here is my shot I extracted the moon from for the brush:
And...here is just a hodgepodge that resulted from my play with the brush. The stars came from a brush that was already included in Photoshop. Not crazy about those particular stars, but it's all I have right now. They made it a little more fun, though, having them in there!