彗星

天文·每日一图

彗星莱蒙的离子尾巴变化

A comet with a green head at the bottom and a complex tail extending toward the top is shown, horizontally side by side, five times. Please see the explanation for more detailed information.
一颗彗星,底部呈绿色,顶部有一条复杂的彗尾,水平并排五次出现。有关更多详细信息,请参阅说明。

天文·每日一图

彗星莱蒙增亮

A starfield is shown that has a bright comet. The comet shows a green head on the lower left and an ion tail with significant structure extending out to the upper right. Please see the explanation for more detailed information.
图中显示的星场中有一颗明亮的彗星。彗星的左下方有一个绿色的彗核,右上方则延伸出一条带有显著结构的离子尾。有关更多详细信息,请参阅说明。

天文·每日一图

双彗星同框于一片天空

A starfield is shown that has two short streaks running diagonally. At closer inspection, they are two comets both with white-green heads and white tails. Please see the explanation for more detailed information.
星空呈现出两条斜向的短条纹。仔细观察,会发现它们是两颗彗星,彗核和彗尾均为白绿色。有关更多详细信息,请参阅说明。

天文·每日一图

新彗星SWAN25B现身墨西哥上空

A starfield is seen above a horizon and an orange sunset. In the starfield, near the horizon, is a comet with a green head and long tail. Please see the explanation for more detailed information.
地平线和橙色夕阳之上,星空清晰可见。星空之中,靠近地平线的地方,有一颗彗星,头部呈绿色,彗尾很长。有关更多详细信息,请参阅说明。

天文·每日一图

星际彗星3I/ATLAS

A drawing of our Solar System shows the orbits of Jupiter and interior planets. A white line shows the trajectory of passing comet 3I/ATLAS. Please see the explanation for more detailed information.
这张太阳系图展示了木星和内部行星的轨道。白线表示彗星3I/ATLAS的轨迹。有关更多详细信息,请参阅说明。

新闻

NASA发现一颗穿越太阳系的星际彗星

7月1日,由NASA资助的ATLAS(小行星地球撞击最后预警系统)位于智利里奥乌尔塔多的望远镜首次报告观测到一颗来自星际空间的彗星。这颗彗星来自人马座方向,现已正式命名为3I/ATLAS。目前,它距离地球大约4.2亿英里(6.7亿公里)。

天文·每日一图

2025史旺彗星

See Explanation. Clicking on the picture will download the highest resolution version available.
请参阅说明。单击图片将下载可用的最高分辨率版本。

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