Rotating Blue Marble image of Earth. Most of the observational data for this image was obtained in 2001 by the Moderate Resolution Imaging Spectroradiometer MODIS on NASA磗 Terra satellite. Also included is Blue Marble data from other satellites and Earth observation systems, including observations of cloud cover, topography and chlorophyll colours in coastal waters. Improved processing was carried out to produce the final image, which includes a thin haze of atmosphere.