Description: 流星（或流星）是小行星或彗星的碎片，或者是太空碎片，進入地球或其他天體的大氣層後，由於與大氣層摩擦產生熱量而發亮。這種摩擦產生的熱量類似於我們在寒冷時搓手取暖的方式。流星通常非常小，從幾毫米到幾釐米不等。天文學家稱它們為流星。通過流星的方向、觀測時間和顏色，我們可以進一步了解流星的起源和構成。

最亮的流星被稱為 "火流星"，經常可以在天空中看到，有時甚至在白天。有時，觀測者甚至會聽到流星在大氣層中燃燒和飛行時發出的聲音。流星還會導致大氣電離，對於地球來說，這可以通過雷達觀測到。

在地球上，一年四季都能看到流星，但偶爾也會在短時間（例如，一晚上的時間）內出現許多流星。其中許多流星雨每年都會重複出現，並根據流星的起源（或輻射）星座來命名。著名的流星雨包括英仙座流星雨和獅子座流星雨。

Related Terms:

• 天體
• 隕石
• 流星體

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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