r/atoptics↗
Atmospheric Optics
Atmospheric Optics. The subreddit for anything related to optic sky phenomena: rainbows, ice halos, aurorae, mirages, cloud iridescence, green flashes, crepuscular rays and spectres of the Brocken.
74k subscribers149 posts / mo in Sep 2026118 authors / mosince 2012
r/atoptics has 74k members (+21% over the last 12 months). It gets about 149 posts a month from 118 people. Top topics: Rainbow Moments, Rainbow Moments and Canadian Storms and Clouds.
When to post on r/atoptics
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How r/atoptics has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/atoptics
Top topics
Share of the subreddit's posts
- Rainbow Moments0.9%
- Rainbow Moments0.8%
- Canadian Storms and Clouds0.6%
- Cloud Types & Identification0.4%
- Halo Community Discussions0.4%
Brands people mention
Most-mentioned brands and sites, last 12 months
- NASA
- National Weather Service
- Wikimedia
Everything else about r/atoptics
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research