Hey guys
It's me, Brndn (I drew the ship). I'm looking back through all this now, it's kinda strange. The original poster "alex" contacted me through e-mail, which is how I found this. I just wanted to let everyone know I exist (and I had to clarify that this is not from any NES game!) I'm at work right now so I can't access the original file for complete proof but I don't know what reason anyone has to doubt me either, ha ha 
Umm I guess if there are more questions I can answer, let me know? Hope this solves some things. I probably should at least upload the original PNG for posterity's sake.
Okay, that's all. I'm glad you guys tracked me down, even if it seems a little creepy! Ha ha!