part B Translation
11.
Here on Earth, daytime is the period when the atmosphere is lighted; sunlight is reflected from water droplets and large molecules in the air. The sky may be dull and gray, deep blue, or have shades of red and many other colors as at sunrise and sunset.
12.
It’s the same on Mercury, pluto, and the Moon, which also don’t have atmosphere. Even when the area around a Moon explorer is brightly lighted by the sun, the sky above is black.
13.
We see light reflections-trees, books, future; also light producers only when we look at them directly.
14.
The Moon’s sky is black, as well as the skies of Mercury and pluto, because there is nothing around them to reflect sunlight. on the Moon you either in intense sunlight, or deepest darkness.
15.
Astronauts report that the view from space is fantastic. But that is only when they look back at Earth. otherwise the scene is monotonous. Except for the stars, which are intensely bright, the sky is black.

解析：
11.
在地球上，白天太阳照射着大气，阳光被空气中的水滴和大分子反射，这样，在日出或日落时，天空看起来就是暗色的，灰蒙蒙的，或者是深蓝色的，红色的以及各种各样其他的颜
12.
在水星，冥王星和月球上同样没有大气。即使月球探测器的周围被太阳照得雪亮，上面的天空还是黑色的。
13.
我们看到的反光体有树木，书本，家具等;而只有我们直视的时候才能看到发光体。
14.
月球的天空与水星，冥王星一样都是黑色的，因为他们的周围没有反射阳光的物质。在月球上，你要么处在强光照射下，要么处在一片黑暗中。
15.
据宇航员的报告说，在太空中只有朝着地球才能看到美妙的景色，而其他方向都是单调乏味的;除了发出强光的恒星之外，太空一片漆黑。