Question

define twinkling of star

Answer 1

Due to atmospheric refraction of light, stars reflect the light of moon and twinkle

Answer 2

THE TWINKLING OF STARS IS DUE TO ATMOSPHERIC REFRACTION OF STARLIGHT. AS THE LIGHT FROM THE STAR ENTERS THE EARTH ATMOSPHERE, IT UNDERGOES REFRACTION DUE TO VERIFYING OPTICAL DENSITIES OF AIR AT VARIOUS ALTITUDE. IN THIS WAY THE STARLIGHT REACHING OUR EYES.