Question

why stars twinkling at night?​

Answer 1

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Stars twinkle because they're so far away from Earth that, even through large telescopes, they appear only as pinpoints. As a star's light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth's atmosphere.

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Answer 2

Answer:

Stars twinkle because … they're so far away from Earth that, even through large telescopes, they appear only as pinpoints. ... As a star's light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth's atmosphere.