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Why Do Stars Twinkle?

Why Do Stars Twinkle?

星星为什么会闪烁?

  1. Starlight travels through space in straight, steady lines.
  2. But Earth’s air moves and changes in temperature and density.
  3. This bends the light slightly as it passes through layers.
  4. The bending makes the star’s position seem to jump or flicker.
  5. Planets do not twinkle much because they look bigger and brighter.
  6. Twinkling is strongest near the horizon where air is thicker.
  7. Astronomers build telescopes on high mountains to reduce twinkling.
  8. Space telescopes like Hubble see stars without any flicker.
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