I just looked at the sky from the other side… I mean I watched the film Gravity and it struck me that it looks much the same from above and below? Maybe the clouds are on a different scale, but they are still white and grey, the blue sea mimics the blue of the sky. We are truly a blue and white marble in the deep ocean of black space. We fall up to space, or down to earth, the thin atmosphere is all that protects us against hard radiation and vacuum.