Orion Telescopes and Binoculars – telescope.com
Oberwerk High Performance Optics for Earth and Sky – https://oberwerk.com
Televue – www.televue.com
Knightware – www.knightware.biz
Celestron – www.celestron.com
SOHO – www.nasa.gov/goddard
International Dark-Sky Association – www.darksky.org
Explore Scientific – www.explorescientific.com
Scope City – www.scopecity.com
Astronomy Magazine – www.astronomy.com
Camera Concepts – www.cameraconcepts.com
David Chandler Company – www.davidchandler.com
Astro Gizmos – www.astrogizmos.com
Bob’s Knobs – www.bobsknobs.com
Meade – www.meade.com
The Planetary Society – www.planetary.org
Royal Astronomy Society of Canada – www.rasc.ca
Astronomy Technology Today – www.astronomytechnologytoday.
Seymour Solar – www.seymoresolar.com
Capturing the Cosmic Light – A Handbook of Astrophotography