why do stars sparkling?
Star is an outer space object that potentially lights. Sun is a star.
Star is more than a beautiful object. It embellishes our night and also history. In tarot card, star means hope. Its myriad meanings indirectly have embellished our living. Another example goes, when a pick-up liner goes a metaphor between a beautiful girl's eye and a star.
Star as an outer space object, doesnt really spark. It looked sparkling if its light seen from far distance and when its light should through far distance air to our eyes.
For example, astronauts in moon, which hasnt atmosphere layer, can see a night sky filled non sparkling stars.
In our earth, a planet that filled with thick atmosphere, we can see stars spark or in more scientifical saying, "refracted".
Around us, air mass always flowing. Hot air moves toward up and vice versa. Air refracts light based on its density. So when starlight through thin air and goes through a thicker one, the light will refracted. The star will be look bigger and low resolutioned. Intensity changing is called scintillation.
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