- Space Exploration
- FlickrCentral
- Photography
- MOON Shots
- panoramas
- Artistic Photography
- Flickr Addicts
- NASA
- Astronomy
- Moon/Luna
- FLICKR NATURE
- Wallpaper and Backgrounds
- Galaxies & Stars Group ( Planets, Moons & Comets too!)
- Scientist Photographers
- Astro Art
- SPACE LOVERS
- Apollo program
- NASA Johnson Space Center
- The Art of Science
- Space art.
- Flickr Crazy - Don't Get Cured, Stay Flickr Crazy!
- Art of Photography
- Astronomy, Stars, Planets and Space
- OUT OF THIS WORLD
- Astronaut Autographs
- "Unlimited Photos: No Rules"
- Riding with Robots on the High Frontier
- Smithsonian: National Air and Space Museums
- Solar system and planets
- Space The Final Frontier
- Far-Out Outer Space
- !!Perfect Composition!!
- Goddard Space Flight Center
- Smithsonian National Air and Space Museum
- Kennedy Space Center Visitors Center
- We choose the moon.
- NASA - Public Domain
- National Museum of the U.S. Air Force
- Astronomers Talk
- BBC Sky at Night and Stargazing Live
- VirtualAstro
- Universe Today
- Astronomy and Space Science - For Explorers of All Ages
- Space stuff
- APOD Submissions
- Astrophotography - The Solar System and Beyond
- This is Why I Bought A Camera
- Advanced Photography in the Digital Age (Invitation)
- Discover Your World
- All Free Pictures (Creative Commons and Public Domain)
- The best photographs from around the world