For a better result, we have to merge down in a group all the layers composing the sphere and its flare (press the
Ctrl button and mark out the necessary layers and then click in the same time on the left mouse’s button to stretch them down on
Create a new group option).
Make 5 copies of the new made group and select the
Free Transform option to change the sizes of the copies and their placement. Change also the colors’ parameters. The flare’s parameters and
Stroke option should be left the way they are.
The parameters of the
red sphere:
Blending Options>Gradient Overlay
Gradient’s parameters: 
The parameters of the
blue sphere:
Blending Options>Gradient Overlay
Gradient’s parameters:
The parameters of the
green sphere:
Blending Options>Gradient Overlay
