R 3 PanSTARRS 彗星與獵戶座
Comet R3 PanSTARRS and Orion

來源:Luc Perrot
(TWAN)|發表日期:2026-05-10
獵戶座從未擁有過這樣的“寶劍”。隨著彗星C/ 2025 R 3 (PanSTARRS)逐漸遠離太陽系內側,它正為長曝光相機呈現一場壯觀的視覺盛宴。目前,這顆彗星位於獵戶座方向,畫面右上角可見遙遠的獵戶座星雲。 R 3 PanSTARRS 彗星目前呈現出兩條鮮明的彗尾:一條短小的塵埃尾指向影像頂部,一條長而波浪狀的離子尾則向左上方延伸。 離子尾指向遠離太陽的方向,因激發的一氧化碳而呈現藍色光芒。塵埃尾中的大顆粒在一定程度上抵禦了將它們推離太陽的輻射壓力,因此仍保留了彗星軌道的一部分。塵埃尾則因反射陽光而發光。這張精選圖片是幾天前在印度洋南部的法國留尼汪島拍攝的。 不斷擴充的相簿: 2026 年的R 3 PanSTARRS 彗星
原文:Orion never had a sword like this. As Comet C/2025 R3 (PanSTARRS) heads out of the inner Solar System, it is putting on quite a show for long exposure cameras. Currently seen toward the constellation of Orion the Hunter, the distant Orion Nebula is visible on the upper right. Comet R3 PanSTARRS is now showing two distinct tails: a short dust tail pointing toward the top of the image and a long and wavy ion tail trailing off toward the upper left. The ion tail points away from the Sun and glows blue from excited carbon monoxide. Large particles in the dust tail somewhat resist the radiation pressure that push them away from the Sun and so retain a bit of the comet's orbit. The dust tail shines by reflected sunlight. The featured image was taken a few days ago from France's Reunion Island in the southern Indian Ocean. Growing Gallery: Comet R3 PanSTARRS in 2026
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