What might cause people to judge that something they see in the sky is a gigantic UFO traveling at an incredible velocity?

Question

Quizplus · Accepted Answer

People may misjudge the distance of an object in the sky, making it appear larger than it actually is, and thus they may perceive it to be a gigantic UFO traveling at high speed.

Answer: B 
 If light from the object falls on the all-rod area of the retina, it can result in a blurry, indistinct image. This can create an illusion of a much larger object than it actually is, which can lead people to believe it is a gigantic UFO traveling at high speed.

Answer: D 
 The retinex principle refers to how the brain processes visual information from the cones and rods in the eyes. It can cause people to see an object in a way that is different from its actual appearance. If an object in the sky is perceived to have a bright, glowing appearance, people may interpret it as a gigantic UFO traveling at high speed.

What Might Cause People to Judge That Something They See