I was watching Discovery HD the other night and saw one of their Science Updates in HD. It was about the satellite sent to Mars that's orbiting and taking pictures of the ground from however high up it is. I think it could be the source of Google Mars images. Anway, a woman described the imaging sensor as a "push broom" type that scans the ground as it passes over. She said the resulting image is equivalent to a 1200 megapixel camera!! Each pixel corresponds to 1 sq ft on the ground, FROM OUTER SPACE!! I was floored by that information. I mean with all the talk about lens resolution power, 39MP backs, it pales in comparison to the optics NASA uses. Does anyone else find this profound?
Sam