阿特拉斯彗星環繞太陽
Comet ATLAS Rounds the Sun
發表日期：2025-01-20
為什麼ATLAS 彗星有如此多彩的尾巴？上週，C/ 2024 G 3 （ATLAS）彗星經過了離太陽最近的地方--水星軌道內側--並大幅變亮。 不幸的是，當時這顆彗星與太陽的角度相差太大，人類很難看到它。但美國宇航局的 SOHO 太空飛行器看到了它。圖為SOHO（LASCO C 3 ）拍攝的ATLAS 彗星影像，該影像由幾種不同的濾色鏡合成。在可見的幾條尾巴中，中央的白色尾巴很可能是由塵埃構成的，只是反射太陽光而已。紅色、藍色和綠色的尾巴可能是離子尾巴，它們的顏色主要是由彗星噴射出的特定氣體發出的光，並被太陽激發。 目前，ATLAS 彗星在南部天空顯示出長長的尾巴，但隨著它移出內太陽系，尾巴的顏色會逐漸變淡。 成長相簿：ATLAS 彗星（G 3 ）
原文：Why does Comet ATLAS have such colorful tails? Last week Comet C/2024 G3 (ATLAS) passed its closest to the Sun -- well inside the orbit of Mercury -- and brightened dramatically. Unfortunately, the comet was then so angularly near the Sun that it was very hard for humans to see. But NASA's SOHO spacecraft saw it. Pictured is a SOHO (LASCO C3) image of Comet ATLAS that is a composite of several different color filters. Of the several tails visible, the central white tails are likely made of dust and just reflecting back sunlight. The red, blue, and green tails are likely ion tails with their colors dominated by light emitted by specific gases that were ejected from the comet and energized by the Sun. Currently, Comet ATLAS is showing long tails in southern skies but fading as it moves out of the inner Solar System. Growing Gallery: Comet ATLAS (G3)
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
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