Take a soft black Brush (Less Opacity and 0% Hardness) to take away some Stars. Add a few Dots drawn with a soft white Brush to create bigger Stars. Then copy the Star Layer you just created and use a Gaussian Blur for it, 5 Pixel should be okay. Just mess around a bit, try out some Stuff.
"Who is it doing this synthetic type of alpha beta psychedelic funkin'?"