阿特拉斯彗星绕太阳运行
(原标题: Comet ATLAS Rounds the Sun)
2025-01-20
浏览次数: 14
为什么阿特拉斯彗星有如此多彩的尾巴？上周，彗星C/2024 G3 （ATLAS）经过离太阳最近的地方——正好在水星的轨道内——并显着变亮。不幸的是，这颗彗星当时非常靠近太阳，人类很难看到。但美国宇航局的SOHO宇宙飞船看到了它。图为阿特拉斯彗星的SOHO （LASCO C3）图像，它是由几种不同的滤色器合成的。在几条可见的彗尾中，中央的白色彗尾很可能是由尘埃构成的，只是反射阳光。红色、蓝色和绿色的尾巴很可能是离子尾巴，它们的颜色主要是由彗星喷出的特定气体发出的光决定的，这些气体是由太阳激发的。目前，阿特拉斯彗星在南部的天空中显示出长长的尾巴，但随着它离开太阳系内部而逐渐消失。成长画廊：彗星ATLAS （G3）
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Why does Comet ATLAS have such colorful tails? Last week Comet C/2024 G3 (ATLAS) passed its closest to the Sun -- well inside the orbit of Mercury -- and brightened dramatically. Unfortunately, the comet was then so angularly near the Sun that it was very hard for humans to see. But NASA's SOHO spacecraft saw it. Pictured is a SOHO (LASCO C3) image of Comet ATLAS that is a composite of several different color filters. Of the several tails visible, the central white tails are likely made of dust and just reflecting back sunlight. The red, blue, and green tails are likely ion tails with their colors dominated by light emitted by specific gases that were ejected from the comet and energized by the Sun. Currently, Comet ATLAS is showing long tails in southern skies but fading as it moves out of the inner Solar System. Growing Gallery: Comet ATLAS (G3)