2025年11月17日
彗星莱蒙的飘逸尾巴
影像提供: Ignacio Fernández
说明: 彗星莱蒙的尾巴发生了什么变化？答案在风中飘扬-这里的风指的是来自太阳的风。太阳持续向外喷射带电粒子，这种持续的喷射流近来变化很大，因为太阳会爆发释放能量，日冕物质抛射（CME），这些爆发能量会推动并偏转彗星自身释放的带电粒子。结果是彗星C/2025 A6（莱蒙, Lemmon）形成了一条蓝色的离子尾，不仅结构精细复杂，还出现了一些不寻常的转折。这张上个月在西班牙 阿尔法卡尔（Alfacar）所拍摄的长时间曝光合成影像捕捉到了内太阳系的这种离子扰动。彗星莱蒙正在逐渐消逝，因为它正远离 地球和太阳，回到外太阳系。
明日的图片: radio milky way
Comet Lemmon’s Wandering Tail
Image Credit: Ignacio Fernández
Explanation: What has happened to Comet Lemmon’s tail? The answer is blowing in the wind — the wind from the Sun in this case. This continuous outflow of charged particles from the Sun has been quite variable of late, as the Sun emits bursts of energy, CMEs, that push out and deflect charged particles emitted by the comet itself. The result is a blue hued ion tail for Comet C/2025 A6 (Lemmon) that is not only impressively intricate but takes some unusual turns. This long-duration composite image taken from Alfacar, Spain last month captured this inner Solar System ionic tumult. Comet Lemmon is now fading as it heads out away from the Earth and Sun and back into the outer Solar System.
Tomorrow’s picture: radio milky way
