Question

Why do stars twinkle? Give the reason.

Answer 1

Hint: First let us see how stars have their own light-
Light is generated in all stars via nuclear reactions, using the energy contained in the tiny nucleus at the core of the atoms. Such reactions make the star so hot that it glows like a massive ball of fire that lets out light and heat.

Complete step by step answer:
So if you follow the hint provided then stars should shine bright like the sun, but instead they twinkle in the night sky. But they don’t twinkle in reality; they just appear like that to our eyes when we see them from the ground. In the night sky, the stars twinkle due to the influence of our atmosphere. It is influenced by conditions in the atmosphere and by regions with varying temperatures and densities as starlight reaches our atmosphere.

Now let us see what happens in detail-
When their light passes through several layers of the earth’s atmosphere, stars except for the Sun appear like tiny dots in the sky. The star’s light is distorted many times and in unpredictable ways.
The star winking out results in this odd refraction and it appears as if the star is flickering a little, and our eye interprets this as twinkling.

Note:
So in short we can say that when we see the stars from the top of the surface stars twinkle due to dense clouds on moving air. There is no atmospheric interference in space, because when seen outside the earth’s atmosphere, the stars do not seem to twinkle.