This explanation works, but there's another: On the horizon, you have things to compare it against. It looks the size it is. In the middle of the sky, there's nothing but a large black field with a small circle: it looks smaller than it is, because it's overwhelmed by the larger field. It's a very well known effect in the art world.
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This explanation works, but there's another: On the horizon, you have things to compare it against. It looks the size it is. In the middle of the sky, there's nothing but a large black field with a small circle: it looks smaller than it is, because it's overwhelmed by the larger field. It's a very well known effect in the art world.