So, there's a io9 article about the Alien prequel that Ridley Scott is making. He says he is going to explain the story of the space jockey that was found in the first film. I am almost 100% positive there was a comic (Dark Horse?) that covered this.

Ridley Scott's Alien and James Cameron's Aliens are two of the greatest sci-fi movies ever made. When it was announced that Ridley Scott would be returning to deliver a trilogy of Alien Prequel films,