Links

Deep Space

• Astronomy Picture of the Day Archive (NASA) - One different (and commented) picture every day.
• Solarviews.com - Views of the solar system.
• Earth Observatory (NASA) - Pictures of the earth.
• Visible Earth (NASA) - Pictures of the visible earth from the space.
• The Galileo Project (NASA) - More pictures from the Galileo project.

Photo

• Agfa Photo Gallery - I think there is no another site like this.
• Le web du PHOTO - Another good site, in french.
• Geophot - Photos of Fire, Water, Ice and Earth.
• Photo.net - A very large collection of photo galleries.
• PhotoLinks - Over 7000 unique photography sites listed.

(Digital) WallPapers

• Digital Blasphemy - Great 3D wallpaper site
• [Virtual Plastic] - A good resource site I know.
• WinCustomize - Not only wallpapers, a lot of resources to customize your Windows desktop.
• EndEffect - Pure digital art.
• Deviant Art - An online community for art and skin lovers.
• DarkProject - More (good) digital wallpapers.