Stars twinkle because the air in our atmosphere moves around. When light from a star travels through the sky, it goes through layers of warm and cool air that move like waves. This makes the light bend or wobble, so we see it flicker, just like when you look at something across a hot road on a summer day.
Examples
- It's like looking at a candle flame through a moving curtain.
- Stars twinkle when you're outside on a cool night.
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See also
- Why Do We See the Same Side of the Moon?
- What If the Moon Was Made of Cheese?
- What If We Could Live on Mars?
- What Makes a Planet 'Gaseous' or 'Solid'?
- What's the Difference Between a Comet and an Asteroid?
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Categories: Space · Stars,Light,Atmosphere,Optics