Why do stars twinkle?
Answers
After passing through the earth’s atmosphere having different layers of air with different optical densities, the rays of light coming from the stars finally reach our eyes.
But, due to the change in the temperature conditions, the optical densities of different layers of air keep changing continuously. Because of which, the rays of light coming from a star are refracted to different degrees at different moments of time, and the path of refracted rays keeps changing.
Hence, sometimes due to the amount of light refracted towards our eyes is more stars appear bright to us, on the other hand sometimes since less light is refracted towards our eyes, the stars appear dim to us.
This gives us the twinkling of stars.
stars mostly consists of hydrogen gas. The heat and light of stars ( which we see as twinkling of stars in the night sky)are produced by the nuclear fusion reactions taking place inside them at all the time.In these fusion reaction hydrogen present inside the stars is converted into helium, with the release of a tremendous amount of heat and light.
Thus, we see that stars twinkle in the night sky