While twinkling makes stars pretty to look at, it also blurs astronomical images, making it difficult to observe things in fine detail. Fortunately we have a technique that can basically un-twinkle the stars, known as adaptive optics.
Adaptation
If you’ve ever looked up in the night sky you’ve seen the twinkling of the stars. This twinkle is not due to the stars themselves, but to the turbulent motion of the Earth’s atmosphere. As starlight enters our atmosphere, the variations in density in turbulent air cause the light wave fronts to distort. So instead of reaching the telescope evenly like even rows of a band on parade, the wave fronts come in uneven and wobbly. This wobbly behavior is why stars appear to twinkle.