This is the stream of images from Landsat 8. These are real images from a satellite operated by USGS, in near-realtime (on weekdays), and they’re free to download at full resolution – click the scene IDs (the things that start LC08…). This is by Charlie Loyd, inspired by James Bridle’s Laaaaaaandsat Tumblr, which I like very much but which appears to be constrained by Tumblr’s post rate limits.