- ACHAYA Astrofotografías
- Astrophotography - ACHAYA Chile
- astrometry
- Astronomers Talk
- Astronomy
- Astrophotography - Astronomy - Astrophysics
- BBC Sky at Night and Stargazing Live
- Deep Space Astrophotography
- Eclipse Solar 2010 Chile
- Este NO ES el grupo oficial de ACHAYA
- Most Beautiful Astronomical Objects
- National Geographic Society
- Southern Astrophotography Conference