The Hubble space telescope has revealed the goings-on of the universe since 1990. The plan was to maintain and upgrade it for many years but now all service flights have been descheduled.
Hubble was to be visited as needed by the Space Shuttle but since the loss of the Columbia those high-orbital flights are considered too dangerous. As it stands, orbit decaying, the telescope will strike the atmosphere and be obliterated.
I have created desktop wallpaper of my favorite Hubble images. They are highest-quality and without signature or logos. You are welcome to visit my pbase and collect them for your own noncommercial use. Be sure to select the ‘original’ size.