保护地球，探索宇宙，发现文明
A dark star filled sky is shown with the wisps extending the length of the image. The wisps are the two tails of Comet 12P. A particularly bright star is visible near the bottom of the frame. Please see the explanation for more detailed information.
图中显示的是一片布满暗星的天空，其中的几缕光线延伸到了图像的长度。这是彗星12P的两条彗尾。在画面底部附近可以看到一颗特别明亮的恒星。有关更多详细信息，请参阅说明。
这张由8张从上到下的庞士-布鲁克斯彗星照片组成的序列，显示了彗星及其在 9 天内不断变化的彗尾。离子尾在每张图像中看起来非常不同，有时比其他时候要复杂得多。有关更多详细信息，请参阅说明。
请参阅说明。单击图片将下载可用的最高分辨率版本。
图中显示了一颗大彗星，其头部靠近右侧，浅蓝色的离子尾流穿过图像的其余部分。有关更多详细信息，请参阅说明。
照片中的彗星有一条非常长的波浪形离子尾。彗星的前部——彗发——看起来是一个螺旋。彗发呈绿色，尾部呈淡蓝色，部分漩涡呈红色。有关更多详细信息，请参阅说明。
请参阅说明。单击图片将下载可用的最高分辨率版本。
2023年9月11日 Beautiful Comet Nishimura Credit & Copyright: Petr Horálek / Institute of Physics in Opava Explanation: This scene would be beautiful even without the comet. By itself, the sunrise sky is an elegant deep blue on high, with faint white stars peeking through, while near the horizon is a pleasing tan. By itself, the foreground hills of eastern S...
2022年1月25日 Video: Comet Leonard over One Hour Video Credit & Copyright: Matipon Tangmatitham (NARIT); Text: Matipon Tangmatitham Explanation: Which direction is this comet heading? Judging by the tail, one might imagine that Comet Leonard is traveling towards the bottom right, but a full 3D analysis shows it traveling almost directly away from the camer...
2022年1月12日 Comet Leonard Closeup from Australia Image Credit & Copyright: Blake Estes (itelescope.net) Explanation: What does Comet Leonard look like up close? Although we can’t go there, imaging the comet’s coma and inner tails through a small telescope gives us a good idea. As the name implies, the ion tail is made of ionized gas — g...
2022年1月10日 Comet Leonard’s Tail Wag Image Credit: NASA, NRL, STEREO-A; Processing: B. Gallagher Explanation: Why does Comet Leonard’s tail wag? The featured time-lapse video shows the ion tail of Comet C/2021 A1 (Leonard) as it changed over ten days early last month. The video was taken by NASA’s Solar Terrestrial Relations Observatory-Ahea...