In the late 70's, nasa tried to hide alien artifacts. When you try to download this Apollo 17 spacecraft picture, you get a complete low-res photography: . If you want to get the hires print photography, you get this one: . Apollo 15 used 4*5 inches silver negatives. No flight problem or scanner distorsion can justify such a mess. A natural negative problem is this one; end of a magazin. . In late 70's nasa couldn't anticipate public internet ,so , it's a nice bad disinformation attempt.