一些宇宙照片，拿来和大家分享
This is what the Earth looks like at night. Can you find your favorite country or city? Surprisingly, city lights make this task quite possible. Human-made lights highlight particularly developed or populated areas of the Earth's surface, including the seaboards of Europe, the eastern United States, and Japan. Many large cities are located near rivers or oceans so that they can exchange goods cheaply by boat. Particularly dark areas include the central parts of South America, Africa, Asia, and Australia. The above image is actually a composite of hundreds of pictures made by the orbiting DMSP satellites.
这就是地球夜晚的样子，你能找到自己喜欢的国家或者城市吗？令人吃惊的是，城市的灯光让这个任务变得很容易。人造灯光使地球表面上发达的或者有人居住的地区变得十分显眼，包括欧洲海岸，美国东部和日本。许多大城市都位于河边或者海边因此它们可以很便宜的通过船只交换物资。特别黑的地区包括南美中部，非洲，亚洲和澳洲。上面的图实际上是由轨道DMSP卫星拍摄的数百张照片组成的。
