23 Sep '12, 10pm

Pyramids at Giza, Egypt: The tombs of the old pharaohs are a favorite subject of photography by astronauts in orbit.

The Great Pyramids at Giza are the last of the Seven Wonders of the Ancient World and perhaps the most famous of the ancient monuments in the Nile River Delta of Egypt. They are also a favorite subject of photography from orbit—particularly when high-resolution imagery can be obtained. This subset of a larger astronaut photograph illustrates the degree of detail visible from the International Space Station (ISS) using a long focal-length lens to provide high magnification. With good illumination of the scene and a steady hand on the camera, current off-the-shelf digital cameras on the ISS can acquire detailed images to rival those of automated satellite sensors. The southeast-facing sides of the pyramids of the pharaohs Khufu, Khafre, and Menkaure are all brightly illuminated by the Sun, while the northwest facing sides are in shadow. This shadowing also highlights smaller...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=79253&s...

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