A spiral galaxy with blue spiral arms and a bright center is shown. The galaxy is surrounded by foreground stars and two smaller galaxies. In the galaxy’s center are dark brown dust and red emission filaments. Please see the explanation for more detailed information.
图中显示的是一个螺旋星系，具有蓝色旋臂和明亮的中心。星系周围环绕着前景恒星和两个较小的星系。星系中心有深棕色尘埃和红色发射条纹。有关更多详细信息，请参阅说明。
A person stands looking over a lake. High in a partly cloudy sky is the Sun. A close look at the Sun will show that there is a dark spot in the center — the Moon during an annular eclipse. Please see the explanation for more detailed information.
一个人站在湖边眺望。在多云的天空中，太阳高高挂起。仔细观察太阳，会发现中央有一个黑点，这就是日环食时的月球。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。
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。
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。
A picture shows clouds across the bottom and a dark night sky across the top. In the middle is a band of orange sky. City lights are visible on the right through gaps in the clouds. In the center of the upper sky is a comet with its tail pointing toward the upper right. Please see the explanation for more detailed information.
图片底部是云层，顶部是漆黑的夜空。中间是一片橙色的天空。透过云层的缝隙可以看到右侧的城市灯光。上方天空的中央是一颗彗星，彗尾指向右上方。有关更多详细信息，请参阅说明。
