What is the Moon illusion?
To an observer on the Earth’s surface, the Moon looks larger in size, when it is on the horizon than when directly overhead. This is an illusion caused by the behavior of the human eye. In fact, the Moon overhead is actually almost 2 % larger in size as compared to the Moon on the horizon.
Can the colour of the Moon change?
The Moon is usually silvery white. However, the nature of the dust in the Earth’s atmosphere can distort the light and make the Moon appear brown, red, blue or even green. Some events like blue Moon are very rare.