I work at a planetarium and for one of our shows, we talk about the moon. I always have to draw up a diagram on the chalkboard and one day I decided that I was going to make it prettier. This diagram is supposed to be read from right to left. The reason for this, is because this is how it appears in the sky if you were to place each phase in order of appearance. This is because like the sun, the moon rises from the east and sets in the west.
When I looked at the original drawing, the style that seemed correct was similar to an old diagram of moon phases drawn in ink on old paper.
The only things I didn't make myself are the fonts, which I got at da font [link]
I made this about memorial day weekend. Since then, I converted the fonts into objects so I don't quite remember their names (I know, I know...bad graphic designer! You should know better!) I might try looking through the fonts later...
Another thing that I didn't make myself were the splatter. I got the splatter from some brush package. I don't remember if i got it from a free site or here. Either way I picked the splatter that i liked the best and made a new image in photoshop and put a new splatter on each document. After I picked all the splatters, I brought it into Illustrator and lived traced everything.