Question

why do stars twinkle in the night?

Answer 1

Stars do not really twinkle, they just appear to twinkle when seen from the surface of Earth. The stars twinkle in the night sky because of the effects of our atmosphere. When starlight enters our atmosphere it is affected by winds in the atmosphere and by areas with different temperatures and densities. This causes the light from the star to twinkle when seen from the ground.
Is it helpful

Answer 2

the stars is in the morning but in sun rays are high than star rays are less so stars twinkle in night