i did Saturn and Titan.
so first I got scrap paper I get two round things, one has to be bigger and one has to be smaller.
Then you trace the round objects on different paper then draw a line in the middle with a ruler. Next cut through the line and cunt out the circle's. After you did that you tape the line up. you get a black piece of paper and you get oil pestles and you use the paste's and make a rough pattern of your planet. If you wanna a make stars try out another way. So first you get white chalk and do like a plus then gen your finger and like go from the middle and go drag it on the line. If you don't understand don't worry there is a video link. Watch the video to make more stuff on the art.