Question

why do stars Twinkle? Explain.​

Answer 1

Stars twinkle due to atmospheric refraction of starlight. As the stars are very far away, they behave as almost point sources of light. A son account of atmospheric refraction, the path of rays of light coming from the star goes on varying slightly, the apparent position of the star fluctuates and the amount of starlight entering the eye flickers. So, sometimes, the star appears brighter and at some other time, fainter. Thus, the stars twinkle.

Answer 2

Hey mate! your answer is here:

The twinkling of stars is due to atmospheric refraction. Atmospheric refraction is the bending of light caused by the earth's atmosphere. stars are very distant, they approximately are point sized sources of light. As the path of the rays of light coming from the stars goes on varying slightly, the Apparent position of the star fluctuates and the amount of star light entering the eye flickers- the stars sometimes appear brighter and at some other time,fainter, which is the twinkling effect.

Hope it helped!