Why do stars twinkle?
Answers
When we look up, we don’t just look into space. We’re actually looking at space through all of the air above us, called the atmosphere.
The Earth’s atmosphere is a layer of air. A whopping 120 kilometres tall, or more. This air, around and above us, moves and swirls around the Earth at different speeds.
How fast this air travels, depends on its temperature. When the air is hot, it has loads of energy and loves to move around. But when the air is cold, it doesn’t move as much.
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The change in intensity of light coming from the stars is called twinkling of stars. The twinkling of stars occurs due to atmospheric refraction of star's light. Hence, the star light reaching our eyes change continuously and stars appear to twinkle.
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