Concur totally with the point about the earths atmosphere affecting the view of bodies in the cosmos. Sun and moon can appear bigger in the sky when low to the horizon because the view goes through a thicker part of the atmosphere
Actually not quite right. When the sun and/or moon are near the horizon, they are viewed through MORE atmosphere, but not actually thicker. (I know - technical hair-splitting etc). The reason they appear bigger is still under discussion - they actually are not any bigger in your field of vision (which has been proven many times and is easy to do yourself by merely holding up an object like your finger and comparing its size with that of the moon, and doing the same when the moon is directly overhead). What happens is your brain interprets the object as bigger than when viewed directly overhead.
This illusion has been known for centuries and has been discussed by scientists since pre-biblical times. There are still several theories as to what causes it, but no firm agreement. Most probable is the 'Apparent distance of Object' explanation.
https://en.wikipedia.org/wiki/Moon_illusion