Aerial View Maps

is there any wallpaper of Earth that changes as the time goes on? Like a satellite image?

I am looking for a free wallpaper program that displays a satellite image of Earth and changes depending on the time or weather. i heard there was something like this but i can't find it. thank you.

Public Comments

1. Never seen any of those mate it would need to be a video clip not a wallpaper.
2. Yup there is a program called desktop earth. http://codefromthe70s.org/desktopearth_dl.asp here's the link for the download