APOD - Astronomy Picture of the Day is a Widgets software developed by Mark Crossley. After our trial and test, the software is proved to be official, secure and free. Here is the official description for APOD - Astronomy Picture of the Day:

Displays the Astronomy Picture of the Day on your desktop. A description of the image is available in a slide out text area that can be positioned on any side of the Widget. Allows you to browse Back and Forth to previous pictures of the day. Double clicking any image opens the WebPage to view the full size version. The Frame and text can be coloured to your wishes, or hidden individually or together. Manual refreshes, refresh timers, and automatic Widget update checking are all configurabl…e via the Widget preferences.

If you like this one, take a look at my other Widgets for more Pictures of the Day based on the same design.