Earth at Night
NASA has a composite picture of the earth at night. Note the concentrations of light! I wonder how far out the lights would be visible to the naked eye. 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…