NASA's Landsat program recently turned the big four-oh, and what better way to deal with the mid-life crisis by getting a new satellite as a present? Accordingly, the space agency has just launched Landsat 8 into orbit to give its Earth Science program a new injection of youth. The new vehicle improves the accuracy of existing light and thermal sensors while widening the scope to better reflect modern climate studies -- number 8 now tracks aerosols in the atmosphere, high cirrus clouds and the telltale signs of water quality a
