Why do stars twinkle: Stars twinkle due to

Stars twinkle due to the Earth’s atmosphere. As light from a star travels through the vacuum of space and enters our atmosphere, it encounters varying layers of air with different temperatures and densities. These layers cause the light to refract, or bend, in different directions. This refraction varies constantly due to atmospheric turbulence, making the star ’s light appear to flicker or ‘ twinkle ’ when observed from the ground. Stars don't actually twinkle The honest answer to why stars twinkle is that they don't. The twinkling we see has nothing to do with the stars themselves. The stars seem to twinkle in the night sky due to the effects of the Earth’s atmosphere. When starlight enters the atmosphere, it is affected by winds in the atmosphere and areas with different temperatures and densities. The twinkling of stars is due to atmospheric refraction of star -light. The atmosphere is made of several layers and the refractive indices which keep on changing continuously due to this path of light rays from the star keep on changing their path continuously. As a consequence the number of rays entering, the pupil of the eye goes on changing with time and the stars appear twinkling.