Why do stars twinkle?
In: Other
Try putting your head underwater and looking up. You will notice that everything seems blobby and wavy. That is because the surface of the water bends the light, and ripples in the surface makes the light bend in weird ways.
The atmosphere does the same thing, but much less so. However, it is enough to make small points of light occasionally disappear as the ripples in the atmosphere bends all the starlight away from you.
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