龐斯-布魯克斯彗星的旋轉昏迷
Comet Pons-Brooks' Swirling Coma
來源：Jan Erik Vallestad｜發表日期：2024-03-18
在下個月的日全食期間，我們將看到一顆明亮的彗星。 之所以會出現這種非常不尋常的巧合，是因為彗星 12 P/Pons-Brooks 在返回太陽系內部的過程中，碰巧在 4 月 8 日地球日全食期間與太陽的距離只有 25 度。 目前，這顆彗星正處於肉眼能見度的邊緣，用雙筒望遠鏡在傍晚的魚座（雙魚座）天空中最清晰可見。儘管如此，龐斯-布魯克斯彗星現在仍在為深度相機拍攝的影像做著相當精彩的表演。 這張特寫圖片由三種非常特殊的顏色合成，以淺藍色顯示了彗星不斷變化的離子尾部，以綠色顯示了其外部彗尾，並突出顯示了彗尾周圍呈螺旋狀的一些發紅氣體。螺旋被認為是巨大冰山彗星緩慢旋轉的彗核排出氣體造成的。雖然預測彗星未來的亮度總是很困難，但龐斯-布魯克彗星特別容易爆發，這使得預測它在 4 月 8 日月亮移到太陽前面時的實際亮度更加困難。 日全食資訊：美國國家航空航天局提供的 2024 年日全食資訊
原文：A bright comet will be visible during next month's total solar eclipse. This very unusual coincidence occurs because Comet 12P/Pons-Brooks's return to the inner Solar System places it by chance only 25 degrees away from the Sun during Earth's April 8 total solar eclipse. Currently the comet is just on the edge of visibility to the unaided eye, best visible with binoculars in the early evening sky toward the constellation of the Fish (Pisces). Comet Pons-Brooks, though, is putting on quite a show for deep camera images even now. The featured image is a composite of three very specific colors, showing the comet's ever-changing ion tail in light blue, its outer coma in green, and highlights some red-glowing gas around the coma in a spiral. The spiral is thought to be caused by gas being expelled by the slowly rotating nucleus of the giant iceberg comet. Although it is always difficult to predict the future brightness of comets, Comet Pons-Brook has been particularly prone to outbursts, making it even more difficult to predict how bright it will actually be as the Moon moves in front of the Sun on April 8. Total Eclipse Info: 2024 Total Solar Eclipse from NASA
※ 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。