Mark your calendar, because you don't want to miss a chance to see the moon showing off its glory! NASA ScienceCasts tell us why. You might want to get your camera ready, too. Now, this says that scientists don't fully understand why the moon looks so much bigger when it's near the horizon. I know a couple of scientists who will explain it to you.
It is not an illusion. The moon is realy closer because it doesn't circle the earth but elipses round the earth. So in some months the moon is closer to the earth.