NASAのインスタグラム(nasa) - 4月17日 09時34分

The Grand Canyon in northern Arizona is a favorite for astronauts shooting photos from the International Space Station. The steep walls of the Colorado River canyon and its many side canyons make an intricate landscape that contrasts with the dark green, forested plateau to the north and south.

The Colorado River has done all the erosional work of carving away cubic kilometers of rock in a geologically short period of time. Visible as a darker line snaking along the bottom of the canyon, the river lies at an altitude of 715 meters (2,345 feet), thousands of meters below the North and South Rims. Temperatures are furnace-like on the river banks in the summer.
This astronaut photograph was taken on March 25, 2014, from the space station with a Nikon D3S digital camera using a 180 millimeter lens. It has been cropped and enhanced to improve contrast, and lens artifacts have been removed.

Image Credit: NASA

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