保护地球，探索宇宙，发现文明
A starfield is shown that includes a bright comet. A bright tail points to the upper right but has an unusual dark streak in it. A thin anti-tail points toward the lower left. Please see the explanation for more detailed information.
图中显示的星空包括一颗明亮的彗星。明亮的彗尾指向右上方，但其中有一条不寻常的暗色条纹。细长的反彗尾指向左下方。有关更多详细信息，请参阅说明。
A town is shown in the foreground surrounded by tall mountains with even taller mountains in the distance. Above them all is a bright white streak that is a comet with both a tail and an anti-tail. High above are stars in the night sky. Please see the explanation for more detailed information.
前景中显示的是一座小镇，四周环绕着高山，远处的山更高。在它们上方是一道明亮的白色条纹，这是一颗有彗尾和反彗尾的彗星。上方是夜空中的星星。有关更多详细信息，请参阅说明。
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 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 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 with a long bright streak running diagonally from the lower left to the upper right. The lower left part of the sky sky orange sprinkled with a few dark clouds. Please see the explanation for more detailed information.
图中星空璀璨，一条长长的明亮条纹从左下方斜向延伸至右上方。天空的左下方为橙色，天空中飘浮着几朵乌云。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。