Flickering stars

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Star Blink (or scintillation, blinking of stars) - Changes in the apparent brightness, position or color of bright, distant objects observed through the atmosphere. If the perceived bright object is on Earth, then this effect is called earth scintillation. In astronomy, this term only means changes in observed star size.

Nowadays it is known that overwhelming blurring of objects in the sky corresponds to the refraction (refraction) of light in relatively small layers or air cells whose temperature (and hence also density) differs from the temperature of the surrounding layers.

Stars blink more than planets because of their much smaller angular size. Blinking is higher when the object is low over the horizon than the zenith.

In observatory astronomy, the flickering of astronomical objects is an obstacle overcome with the aid of adaptive optics or space telescopes.

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