Question

why do the stars appear twinkle??​

Answer 1

Answer:

In fact, most of the stars are shining with a steady light. The movement of air (sometimes called turbulence) in the atmosphere of Earth causes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground.

Answer 2

Answer:

this is due to multiple refraction as are at a great distance from Earth and due to multiple refraction the light comming from them seems to twinkle