Creating a sun
Start with a new document, about 600x600.
Press CTRL+D to reset your color palletes to black and white.
Use the paint 
bucket tool to fill your background layer with black.
Then use the Circular Marquee tool 
to make a big round selection on the canvas.
(note: hold down SHIFT while you make the selection to create a perfect round circle)
Now apply this filter: Filter » Render » Clouds
Now apply: Filter » Brush Strokes » Accented Edges.
set: Edge Width: 7, Edge Brightness: 40, Smoothness:5
You should still have your circle selection around the shape.
Go to: Filter » Distort » Spherize
SET: Amount 100%, mode: normal.
Then do this again, but this time apply 30%
Now you can press CTRL+D to deselect.
Aply this filter: Filter » Distort » Polar Coordinates
SET: Polar to Rectangular
Then go to image » Rotate Canvas » 90CW
Then go to Filter » Stylize » Wind
SET: Method: Wind, Direction: From the Right
Then go to Image » Rotate Canvas » 90CCW
then apply: Filter » Distort » Polar Coordinates
SET: Rectangular to Polar
Now go to: Filter » Distort » Ocean Ripple
SET: Ripple Size: 5, Ripple Magnitude: 2
Now apply: Filter » Sharpen » Unsharp Mask
SET: Amount: 250, Radius:6, Threshold: 85
Then go to Image » Adjustments » Color Balance.
SET: Set all Shadows, Midtones, and Highlights to the following:
(note: you can play around with these settings to get different shades of the colors)
