- The Astronomical League
- Composed of over two hundred and forty local amateur astronomical societies from all across the United States.
- NexStar 50 Club
- Shows data table of observed deep sky and planetary objects including moon features. Also includes list of members and reference works.
- Sky Watch
- Comprehensive list of all things astronomy. Find clubs, links, galleries, resources, books, and articles.
- Urban Observing Club
- Contains details about the policies, membership privileges, merchandise and forthcoming activities of the group.
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