Here's a breakdown:
* Atmospheric Refraction: When light passes through the atmosphere, it bends due to varying density. This bending is more pronounced near the horizon, where the light has to travel through a greater thickness of air. This causes the moon to appear slightly higher in the sky than it actually is, and also slightly magnified.
* Optical Illusion: The "moon illusion" is a well-documented phenomenon that makes the moon appear larger when it's near the horizon compared to when it's high in the sky. This illusion is thought to be caused by several factors:
* Relative Size: When the moon is near the horizon, we compare its size to familiar objects like trees or buildings. This comparison makes it appear larger than when it's high in the sky, where there are fewer objects to compare it to.
* Depth Perception: The atmosphere creates a sense of depth, making the horizon appear farther away. This perceived distance makes the moon seem larger.
* Brain Processing: Our brains are wired to perceive objects that are closer as larger. This perception is amplified when we're looking at the moon near the horizon, as the atmosphere creates a sense of greater distance.
While atmospheric refraction plays a role in the apparent size change, the optical illusion is the main reason the moon seems larger near the horizon.
