This image is composed of three different images 

1.  Northen Lights
2. Desert 
3. Myself

i Took myself (Simon) away from the background of the original image then i menipulated the northen lights by changing the colour from blue to purple then i added a effect that changed the green of the lights to a reddy orange colour. the last ellement that i did was add a curve affect to the immage to try to make it darker so that the two images merge into one. below are the origan images.