Question

Give a reason why Stars twinkle in the sky?

Answer 1

Twinkling Effect of Stars:

1. The atmosphere of the earth is made of different layers. It is affected by winds, varying temperatures, and different densities as well.
2. When light from a distant source (a star) passes through our turbulent (moving air) atmosphere, it undergoes refraction many times.
3. When we finally perceive this light from a star, it appears to be twinkling.
4. This is because some light rays reach us directly, and some bend away from and toward us. It happens so fast that it gives a twinkling effect.