Question

stars are twinkling.why?​

Answer 1

heya fam!

Since stars are very far away from our planet so, they appear as point objects. The light comes from a point source and when enters our atmosphere undergoes multiple refraction and so the amount of light entering the eye/caught by our eye flickers. Due to this flickering of light Stars appear to twinkle.

Cheers!

Answer 2

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The stars are very distant. There approximate size sources of light. As the path of rays of light coming from the star goes on carrying slightly. The apparent position of the star and the amount of star light entering the eye flickers . The star sometimes appears brighter and at some other times fainter , which is the twinkling effect.