Why do stars in the night's sky appear to twinkle?
user
Twinkling stars have wobbly light, which can be modeled by the vibration of a stretched string.  In addition, the eye also acts like a lens with a particular focal length, which produces a natural telescope effect that can make stars look bigger or smaller, depending on where you’re looking.
assistant
Isn't it because the light of stars bends as it goes through our atmosphere?
user
Yes, twinkling happens because light is passing through the Earth’s atmosphere and is influenced by the atmosphere’s temperature, pressure, and other factors.
assistant
Why do stars in the night's sky appear to twinkle?
user
Twinkling stars have wobbly light, which can be modeled by the vibration of a stretched string.  In addition, the eye also acts like a lens with a particular focal length, which produces a natural telescope effect that can make stars look bigger or smaller, depending on where you’re looking.
assistant
Isn't it because the light of stars bends as it goes through our atmosphere?
user
No, the light from stars would be absorbed by the atmosphere long before it could get to the surface of the earth.  And besides, the twinkling would only happen at night.
assistant
Why do stars in the night's sky appear to twinkle?