Why Do Stars Twinkle?

Have you ever wondered why stars twinkle at night? 你有没有好奇过，夜晚的星星为什么会闪烁？ Many kids think stars blink on their own, but this is not true. 很多小朋友以为星星自己会眨眼，但其实并不是这样。 Stars always shine bright and steady in space. 星星在太空中一直明亮且稳定地发光。 The twinkling comes from Earth’s air around us. 闪烁的现象，来自地球周围的大气层。 The air is always moving and changing. 空气无时无刻不在流动、变化。 When starlight passes through moving air, it bends a little. 当星光穿过流动的空气，光线会发生轻微折射。 This makes the light look brighter and dimmer quickly. 这就让星光看起来忽明忽暗。 So we see stars twinkle in the night sky. 所以我们在夜空里能看到星星闪烁。 In space, stars never twinkle at all. 而在太空中，星星完全不会闪烁。