一個天空中的兩顆相機彗星
Two Camera Comets in One Sky
來源：Luc Perrot
(TWAN)｜發表日期：2025-09-29
這些彗星看起來像是在賽跑，其實不然。C/ 2025 K 1 ATLAS 彗星（左）和C/ 2025 R 2 SWAN 彗星（右）上週在南印度洋法國留尼汪島拍攝的照片中偶然出現在彼此附近。 較暗的 ATLAS 彗星正在接近太陽，並將在 10 月初達到最近距離，預計屆時它也將達到最亮的狀態--不過仍然只能透過相機的長時間曝光才能看到。 更亮的彗星暱稱為 SWAN 25 B，目前正在遠離我們的太陽，不過預計它將在 10 月中旬最接近地球，樂觀估計屆時它的亮度將足以用肉眼看到。 每顆彗星都有一個由排出氣體組成的綠色彗尾和一個指向太陽的離子尾巴。 成長相簿：SWAN 25 B 彗星
原文：It may look like these comets are racing, but they are not. Comets C/2025 K1 ATLAS (left) and C/2025 R2 SWAN (right) appeared near each other by chance last week in the featured image taken from France's Reunion Island in the southern Indian Ocean. Fainter Comet ATLAS is approaching our Sun and will reach its closest approach in early October when it is also expected to be its brightest -- although still only likely visible with long exposures on a camera. The brighter comet, nicknamed SWAN25B, is now headed away from our Sun, although its closest approach to Earth is expected in mid-October, when optimistic estimates have it becoming bright enough to see with the unaided eye. Each comet has a greenish coma of expelled gas and an ion tail pointing away from the Sun. Growing Gallery: Comet SWAN25B
※ 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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