Honest-to-God (almost) real-time satellite data from the EarthNow! viewer. The catches are that it’s low-resolution (250-meter) Landsat data streamed from the satellite to your computer screen, so you only see the area the satellite was above recently. And since the image data is constantly scrolling across the screen, the only way to save an image is to do a screen capture. Still, fun to watch (click on the image below for a larger view, showing part of Michigan):
Edited 4/25 to change the resolution from 30 meters (which is what processed Landsat band data is) to the correct number of 250 meters. Also, it’s not really “real-time”, but almost.