Why do stars twinkle?
A) due to rapid changes occurring on their surfaces
B) due to their movement across the sky
C) due to the refraction caused by atmospheric irregularities
D) due to imperfections in the human eye

Question

Quizplus · Accepted Answer

Stars twinkle because of the refraction of their light caused by the Earth's atmosphere. As the light passes through different layers of the atmosphere, which have varying temperatures and densities, it bends and causes the star's light to appear to change in brightness and position.

Why Do Stars Twinkle