I've found several different ways to create stars.
Creater a new layer
and call it stars. Like in step 2, select 2/3 of the page with the square tool,
fill it with black. Then go to filter/noise/add noise. settings at 11 then fill
it with black again. Kool ah. After that select your Magic Wond
and at the top make sure that the tolerance is set to 7. Then hit delete. Hit
(Ctrl+D) which will deselect the stars.
Now go to Image/Adjust/Brightness+Contrast.
Brightness +100 and contrast +50 or however bright you want your stars.
step. Making it look like the stars fade.
Eraser, pressure at100, the bottem
part of the stars with paint brush tool (size of 200). Make sure you specify the
size of the brush.
Note: by holding down shift while using any tool
you will get a straight line.
Making bigger stars is up to you.
all of these layers. check