Acuter
Apogee Instruments

Astronetti keskustelufoorumi
Astronomik
Atik CCD-cameras
Baader Planetarium
Canon
Celestron
Cloudy Nights
DayStar Filters
iOptron
Losmandy
Lunt Solar Systems
National Geographic
NOAA - Aurora Forecast
Officina Stellare
Orion Optics
Orion Telescopes & Binoculars

QHY- ccd
Quantum Scientific Imaging

Sandisk
Sky & telescope -lehti
Sky-Watcher
Sodankylä Geophysical Observatory
Sonnenobservatorium Bad Salzschlirf
Sotkamo
Takahashi
The Imaging Source
Thousand Oaks Optical
Tiede-lehti
Tiedetuubi
Tähdet & Avaruus- lehti
Unihedron
Vixen
William Optics