I see pictures of the moon that looks like it is very close to the earth; I am wondering whether they are real or is there a trick to show the moon that big?
Here is an example: http://www.spaceweather.com/swpod2011/20mar11/Paco-Bellido1.jpg
Answer
Those are done using the compression of a telephoto lens. Longer lenses will magnify the subject, so will make the moon look bigger. It will also make buildings and other objects bigger, but by moving yourself further away from those earthbound objects you can reduce them back to a smaller size. But you can't really get further away from the moon, so it will remain the same size no matter where you move locally.
So in your example, that might look like it was taken from a short distance away with a 50mm lens, but in fact it may have been taken much further away with a 500mm lens. Result is the foreground looks about the same as if you'd taken it closer with a 50mm lens, but the moon on the other hand is magnified quite a bit.
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