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The 100-megapixel Moon

100 Megapixel Moon

Seán Doran used images from the Lunar Reconnaissance Orbiter to create this 100-megapixel image of the Moon (full 10000x10000 pixel image here). Phil Plait explains how Doran made the image:

LRO WAC images have a resolution of about 100 meters per pixel over a swath of about 60 km of lunar surface (using what’s called the pushbroom technique, similar to how a flatbed scanner works). They are usually taken straight down, toward the spacecraft nadir (the opposite of the zenith). To get the correct perspective for the Moon as a globe, Doran took the images, along with altimeter data, and mapped them onto a sphere. That way features near the edge look foreshortened, as they really do when you look at the entire Moon. He also used Apollo images to make sure things lined up. So the image isn’t exactly scientifically rigorous, but it is certainly spectacular.

The image is also available at Gigapan for easier exploration.