Erika,
by shape of stars are you referring to how they are represented in culture?
I’m not clear, since your opener is about stars in the sky?
It is interesting that the brighter stars seem to twinkle, so giving a “star shape”
You can read a little about it from my colleague Niall: https://www.irishexaminer.com/lifestyle/outdoors/arid-41257189.html
However, stars are spheres!
Would the “star-shaped dot patterns” be of random dots, so allowing constellations to be made, or of a star made from dots?
All constellations are described here: https://www.iau.org/public/themes/constellations/