Shadow nears the moon,scientific visualization.
At the Moon's North and South Poles, the Sun is never more than 1.5° above or below the horizon. The resulting pattern of daylight and shadows is unlike anywhere else on the Moon — or on Earth. After zooming in on a small lunar highland area near the South Pole, this visualization recreates the illumination conditions there over a period of two lunar days, equal to two months on Earth.
This close to the pole, the Sun doesn't rise and set. Instead, as the Moon rotates on its axis, the Sun appears to skim the horizon, traveling a full 360 degrees around the terrain. Mountains as far as 75 miles (120 kilometers) away cast shadows across the landscape. With the Sun at such a low angle, its light can never reach the floors of some deep craters. Places that sunlight never reaches are known as permanently shadowed regions. These are some of the coldest spots in the solar system, and because of that, they trap volatile chemicals, including water ice, that would immediately sublimate (transform directly from a solid to a gas) in the harsh, airless sunshine that illuminates most other places on the Moon.
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