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十万个为什么·科学阅读30篇(3)

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Why Do Stars Twinkle?

Why Do Stars Twinkle?

星星为什么会闪烁?

  1. Stars are huge balls of hot gas far away.
  2. Their light travels through Earth’s moving air.
  3. Air layers have different temperatures and densities.
  4. This bends the light path slightly and often.
  5. Our eyes see the light jump around quickly.
  6. Planets shine with reflected sunlight and look steadier.
  7. They are closer and look like small disks, not points.
  8. Twinkling is called atmospheric scintillation.
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