New submitter klchoward
writes "Working for NOAA, I have been really pleased to see the weather data from the new Suomi NPP satellite coming into our computer models already but have been blown away by its capability to take stunning high-definition images of our planet. See the article at Huffington Post or go straight to the image at NASA's website."
Reader derekmead has some images from further afield, too: these beautiful images of Mars
come from NASA's High Resolution Imaging Science Experiment camera, mounted on the Mars Reconnaissance Orbiter.