Warning: some download projects are outdated, but we are working on it.
The best 100 hi-res images (up to 400 megapixels!) from ESA/Hubble: planets, stars, nebulae, galaxies and more.
Collection of the top-rated photos from National Geographic: Animals, Adventure And Exploration, Black And White, History, Landscapes, Nature And Weather, People And Culture, Science And Space, Travel, Underwater.
A set of nice HQ space wallpapers (wide & standard) - satellites, planets, stars, constellations, galaxies.