* Atmospheric Refraction: As sunlight enters Earth's atmosphere, it bends due to the different densities of air at various altitudes. This bending makes the sun appear slightly higher in the sky than it actually is, especially near the horizon. This effect is more pronounced at sunrise and sunset when the sun is low in the sky.
* Perspective: When the sun is close to the horizon, it appears larger because our brains are comparing it to objects on the ground. These objects provide a reference point, making the sun seem bigger in relation to them.
* Atmospheric Scattering: The scattering of sunlight by particles in the atmosphere can make the sun appear slightly larger and less sharp.
* Optical Illusions: Our brains also play a role in how we perceive the size of the sun. When the sun is low in the sky, it can appear elongated or flattened, further contributing to the illusion of a larger size.
In reality, the sun's size remains constant. The apparent changes in its size are due to these atmospheric and perceptual factors.
