TerraTime is described as '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' and is an app in the Online Services category. There are more than 10 alternatives to TerraTime for a variety of platforms, including Windows, Mac, Android, iPhone and Android Tablet. The best alternative is Desktop Earth, which is free. Other great apps like TerraTime are Close Enough Clock (Freemium), EarthDesk (Paid), EarthView (Paid) and MeteoEarth (Freemium).
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.