I was looking at the moon rising and noticed that it starts off quite yellow/orange and gets more and more white as it reaches the middle of the sky. Why does it look bigger? I'd imagine it's something to do with refraction, but how exactly does it work? Does the moon look more orange closer to the horizon because the light to reach it took a longer path through our atmosphere, and, therefore, more blue light/UV light has been absorbed/scattered and so more light in the lower energy spectrum reaches the moon? I thought of this since it appears white in the middle of the sky, where almost no light reaching it has passed through our atmosphere (ignoring the light that came back from it to hit earth) Oh and it to my assumption, since our ozone blocks light in the UV/UVB range, does that mean it will also block some bluer/purple light? Does the sky look blue because the molecules that make up our atmosphere let lights through and absorbs some of the blue light and re-emits everywhere, making it so the sky appears to be blue?