保护地球，探索宇宙，发现文明
A starfield is shown with a bright comet. The main tail of the comet points diagonally to the upper left, while a thin anti-tail points to the lower right. Mountain peaks are visible at the bottom in the foreground. Please see the explanation for more detailed information.
星空下有一颗明亮的彗星。彗星的彗尾指向左上方，而细长的反彗尾指向右下方。前景底部可见山峰。有关更多详细信息，请参阅说明。
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。
See Explanation. Clicking on the video will download the highest resolution version available.
请参阅说明。单击视频将下载可用的最高分辨率版本。
The Lincoln Memorial monument in Washington, DC, USA is pictured from afar. Behind the monument is a sunset-colored pink sky. In the sky, on the upper left, is a white streak that is a comet. Please see the explanation for more detailed information.
从远处眺望美国华盛顿特区的林肯纪念堂。纪念堂后面是一片夕阳下的粉色天空。天空左上方有一条白色条纹，那是一颗彗星。有关更多详细信息，请参阅说明。
A starry sky is pictured just after sunset. The silhouette of plants and a distant landscape covers the bottom of the picture. Spanning most of the frame is a comet with an amazingly long and complex tail. Please see the explanation for more detailed information.
照片中是日落之后的星空。植物的轮廓和远处的风景覆盖了图片的底部。一颗彗星占据了大部分画面，彗尾长得惊人且复杂。有关更多详细信息，请参阅说明。
2023年8月21日 Introducing Comet Nishimura Credit & Copyright: Dan Bartlett Explanation: Will Comet Nishimura become visible to the unaided eye? Given the unpredictability of comets, no one can say for sure, but it currently seems like a good bet. The comet was discovered only ten days ago by Hideo Nishimura during 30-second exposures with a standard digita...
2023年1月31日 A Triple View of Comet ZTF Image Credit & Copyright: Javier Caldera & Miguel Gracia Explanation: Comet ZTF has a distinctive shape. The now bright comet visiting the inner Solar System has been showing not only a common dust tail, ion tail, and green gas coma, but also an uncommonly distinctive antitail. The antitail does not actually le...
2023年1月9日 Tails of Comet ZTF Image Credit & Copyright: Jose Francisco Hernández Explanation: Comet ZTF may become visible to the unaided eye. Discovered early last year, this massive snowball has been brightening as it approaches the Sun and the Earth. C/2022 E3 (ZTF) will be closest to the Sun later this week, at which time it may become visible even w...
2022年12月24日 Comet 2022 E3 (ZTF) Image Credit & Copyright: Dan Bartlett Explanation: Comet C/2022 E3 (ZTF) was discovered by astronomers using the wide-field survey camera at the Zwicky Transient Facility this year in early March. Since then the new long-period comet has brightened substantially and is now sweeping across the northern constellation Coron...
2021年12月30日 The Further Tail of Comet Leonard Image Credit & Copyright: Daniele Gasparri Explanation: Comet Leonard, brightest comet of 2021, is at the lower left of these two panels captured on December 29 in dark Atacama desert skies. Heading for its perihelion on January 3 Comet Leonard’s visible tail has grown. Stacked exposures with a wide an...