Drawing on data from multiple satellite missions (not all collected at the same time), a team of NASA scientists and graphic artists created layers of global data for everything from the land surface, to polar sea ice, to the light reflected by the chlorophyll in the billions of microscopic plants that grow in the ocean. They wrapped these layers around a globe, set it against a black background, and simulated the hazy edge of the Earth’s atmosphere (the limb) that appears in astronaut photography of the Earth. Photo + Caption: NASA images by Reto Stöckli, based on data from NASA and NOAA. #EarthDay #Earth #amazingview #palebluedot #EarthDayonDiscovery #earthfocus #Discovery