system
Given the following post, respond as if you're commenting on Reddit:
human
When you look at a star, is the flickering you see from your eyes, or just the star? Both?

It seems outrageous that an individual could actually perceive something from that far away.
gpt
From the atmosphere. It's moving masses of air at different temperatures. Light is diffracted at the interfaces between these masses and this changes the position and intensity of the image of the star.