A starfield is shown filled with colorful gas glowing in different colors, and dark dust. Please see the explanation for more detailed information.
图中显示的星场充满了发出不同颜色光芒的彩色气体和暗色尘埃。有关更多详细信息，请参阅说明。
A night sky is seen over a lake. The sky contains numerous stars including the Big Dipper asterism. Prominent in the sky is a comet with a long tail. Both the Big Dipper and the comet are seen reflected in the still water of the lake. Please see the explanation for more detailed information.
夜空笼罩着一片湖面。天空中繁星点点，包括北斗七星。一颗拖着长彗尾的彗星在夜空中格外显眼。北斗七星和彗星的倒影映照在平静的湖面上。有关更多详细信息，请参阅说明。
The nucleus of a comet is shown against the dark of deep space. The comet’s surface is jagged and irregular. A stream of dust and gas drifts off to the upper left. Please see the explanation for more detailed information.
彗星的核在漆黑的深空映衬下清晰可见。彗星表面凹凸不平，一股尘埃和气体飘向左上方。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。
A horizon including the Tucson skyline and Saguaro cacti shows the sky just after sunset. Prominent in the sky are clouds oddly shaped like a fish — but are the launch plume of a recently launched rocket from California. Please see the explanation for more detailed information.
日落之后，地平线上映照着图森的天际线和仙人掌。天空中一朵朵形状奇特的云朵格外醒目，形似一条鱼——但这却是最近从加州发射的火箭的发射羽流。有关更多详细信息，请参阅说明。
The featured image shows an interstellar gas globule that looks like a monster superposed against a glowing red background. Please see the explanation for more detailed information.
这张特色图片展示了一个星际气体球，它看起来像一个怪物，叠加在炽热的红色背景上。有关更多详细信息，请参阅说明。
Earth without water is shown on the right, while Jupiter’s moon Europa is shown on the left. Superposed on each object is a blue sphere estimating the amount of water each object contains. The blue spheres are about the same size. Please see the explanation for more detailed information.
右侧显示的是没有水的地球，左侧显示的是木星的卫星木卫二。每个物体上都叠加了一个蓝色球体，用于估算每个物体所含的水量。这些蓝色球体大小大致相同。有关更多详细信息，请参阅说明。
