雪山上空的雙子座流星
Gemini Meteors over Snow Capped Mountains

來源:Tomáš Slovinský|發表日期:2025-12-15
這些流星都來自哪裡? 從天空的方向來看,尖銳的答案是雙子座。 這就是為什麼 12 月的主要流星雨被稱為雙子座流星雨的原因--因為流星雨中的流星似乎都來自一個朝向雙子座的輻射體。然而,從三維角度來看,從不規則的小行星 3200 Phaethon 排出的沙粒大小的碎片沿著一個明確的軌道圍繞太陽執行,而接近地球的那部分軌道疊加在雙子座的前面。因此,當地球穿過這條軌道時,墜落碎片的輻射點就會出現在雙子座。這裡展示的是過去幾天在斯洛伐克黑暗的天空中拍攝的許多影像的合成照片,捕捉到了 Belianske Tatra 山脈白雪覆蓋的山峰 可以看到大量來自雙子座流星雨的明亮流星條紋。 獵戶座在地平線上方清晰可見,而離輻射體最近的亮星是卡斯托爾星。 APOD 回顧:RJN 的夜空網路講座
原文:Where are all of these meteors coming from? In terms of direction on the sky, the pointed answer is the constellation of Gemini. That is why the major meteor shower in December is known as the Geminids -- because shower meteors all appear to come from a radiant toward Gemini. Three dimensionally, however, sand-sized debris expelled from the unusual asteroid 3200 Phaethon follows a well-defined orbit about our Sun, and the part of the orbit that approaches Earth is superposed in front of the constellation of Gemini. Therefore, when Earth crosses this orbit, the radiant point of falling debris appears in Gemini. Featured here is a composite of many images taken over the past few days through dark skies from Slovakia and capturing the snow-covered peaks of the Belianske Tatra mountains Numerous bright meteor streaks from the Geminids meteor shower are visible. Orion is visible above the horizon, while the bright star nearest the radiant is Castor. APOD Review: RJN's Night Sky Network Lecture
※ 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!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。