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While exploring the NASA Apollo moon photos I (Scott C. Waring/UFOlogist) came across a photo that showed a black circle with slightly uneven edges like a crater. I found this odd since I could not see the bottom of the crater, but such black circle craters have been discovered before.

I knew from the past that there is record on April 29, 2007 when an Astronomer Alberto Mayer who lives in Busto Arisizio, Italy saw and recorded a giant black circle that moved across the lunar surface then then 75% across it turned at a right angle. This is one of my videos and can be seen at http://www.youtube.com/watch?v=4Wg0lR0FIoM

It is because of that video that I consider that this might not be an opening but instead a mothership sailing over the surface of the moon.

I believe the door into the moon is also possible due to the evidence that the moon is artificially made. Look at my other youtube videos to see this evidence, but I cannot discount that it might have been a UFO mothership. Further analysis by more experts in this field is necessary.
 
Referenced Official Photos:

Hole: http://www.lpi.usra.edu/resources/apollo/frame/?AS17-P-3165

No hole:  http://www.lpi.usra.edu/resources/apollo/frame/?AS17-P-3166

No hole: http://www.lpi.usra.edu/resources/apollo/frame/?AS17-P-3164