system
Given the following post, respond as if you're commenting on Reddit:
human
Why do lights always flicker when watched from very far away?(like a city on the horizon)

I have no idea what flair i should choose.
gpt
What you are seeing is the disturbance in the air in between you and the light source by wind or heat(convection). The reason this only seems to occur at great distance is because you are looking through a larger portion of the atmosphere at your target, therefore the light has to travel through more turbulence than a close light source. This is the same reason that stars "twinkle", as anytime you are looking at an object in the night sky, the light is travelling through the entire atmosphere before it gets to you.