... But what's wrong with my pictures? Silence does mean something. Maybe there are mostly pros (no sarcasm) on this forum an this is no place for the amateur (no sarcasm)?
There are plenty of amateurs here. Silence does mean something, though not necessarily that there is something "wrong" with your pictures. Several reasons come to mind:
1. People are busy (though there would be most likely someone having to say something, given enough time)
2. Pictures are "below critique", i.e., so uninteresting or bad that people would rather refrain from saying anything, than being negative (especially when it comes to new members - well established members have enough credibility to withstand an occasional "this image sucks" - just check reactions to MR's own photographs)
3. Pictures do not move enough, i.e., provoke enough reaction, mostly because they are neither here nor there, i.e., neither bad enough, nor good enough to cause people to react by writing a critique.
Now, about your pictures. They just do not move me enough. I see there is an interesting initial concept (contrasting light and dark, man-made vs. nature), but the execution is rather busy and lacks focus (conceptual focus, not sharpness). One way to handle this concept would be to "work the scene", to select, isolate and simplify, perhaps by coming closer. Also, if the Moon is to play any role, I would like to see it is the Moon indeed, rather than an overexposed blob or huge spec of dust, by providing some texture to it (I know, not always easy to achieve in a single shot, but still... in this case a second exposure, for the Moon only, would have helped... or trying to rescue it by highlight recovery function of your raw converter).