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十万个为什么·科学阅读30篇(8)

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Why Do Stars Twinkle?

Why Do Stars Twinkle?

星星为什么会闪烁?

  1. Starlight travels far through space in straight lines.
  2. When it reaches Earth, air moves and changes shape.
  3. Hot and cold air layers bend the light slightly.
  4. This bending makes the light shift and flicker.
  5. Planets do not twinkle much because they are closer.
  6. Their light covers more area in our sky.
  7. Twinkling is stronger near the horizon.
  8. There, light passes through more moving air.
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