The tutorial

http://psd.tutsplus.com/tutorials/illustration/design-a-rocket-powered-retrofuturistic-digital-illustration/

http://abduzeedo.com/displace-filter-vector-effects

http://webexpedition18.com/articles/15-killer-photoshop-tutorials-inspired-by-space-planets-and-stars/

http://abduzeedo.com/space-lighting-effects-10-steps-photoshop-tutorial