EarthDesk is described as 'Xeric Design, Ltd. is a leader in global time and mapping software. Its flagship product, EarthDesk, for both Macintosh and Windows, is enjoyed by users in more than 140 countries' and is an app in the Travel & Location category. There are more than 10 alternatives to EarthDesk for a variety of platforms, including Windows, Mac, Android, iPhone and Android Tablet. The best alternative is TerraTime. It's not free, so if you're looking for a free alternative, you could try Desktop Earth or MeteoEarth. Other great apps like EarthDesk are EarthView (Paid), Living Earth Desktop (Paid), Living Earth (Paid) and Xplanet (Free, Open Source).
TerraTime provides an amazing, interactive, real-time virtual Earth. Its globes and maps use current satellite imagery to simulate day/night, clouds, seasons, sun & moon; clock shows rise, set, twilight, & transit times for sun & moon.
You should run it as admin. Desktop Earth is a wallpaper generator. It will generate a high-resolution, accurate representation of the Earth. The imagery is based on NASA's Blue Marble Next and Earth's City Lights.
xplanet (by Hari Nair) is a great piece of software capable of creating renderings inside our solar system. To raise the quality of its output adding some graphical effects, it was a great candidate to link with imagemagick.