彗星R3、泛星和猎户座
(原标题: Comet R3 PanSTARRS and Orion)
2026-05-10
浏览次数: 1484
俄里翁从来没有这样的剑。随着彗星C/2025 R3 （PanSTARRS）驶出太阳系内部，它为长曝光相机带来了相当大的表演。目前看到的猎户座星座，遥远的猎户座星云在右上方可见。R3 PanSTARRS彗星现在显示出两条截然不同的尾巴：一条短的尘埃尾巴指向图像的顶部，一条长而波浪状的离子尾巴指向图像的左上角。离子尾部指向远离太阳的方向，并因受激发的一氧化碳发出蓝光。尘埃尾部的大颗粒在某种程度上抵抗了将它们推离太阳的辐射压力，因此保留了一些彗星的轨道。尘埃的尾巴因反射的阳光而发光。这张特色图片是几天前在南印度洋的法国留尼汪岛拍摄的。成长画廊：2026年的彗星R3 PanSTARRS
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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
© Luc Perrot (TWAN)