Main Engine Cut Off:
Watch sunlight and weather patterns move across Earth throughout the day, and bask in the glory of our blue marble in real time.
Every 20 minutes (or every hour, you pick), Downlink updates your desktop background with the newest images of Earth.
Choose from 8 different views of Earth, including stunning full disk images from 3 different geostationary satellites.
Dave posted about dynamic wallpapers on Monday and I thought this would be a nice addition to that story.