r/exoplanets↗
Exoplanets - Extrasolar Planets and Astrobiology
This is where you can discuss extrasolar planets, commonly known as exoplanets, and related sciences including exoplanet detection methods, exoplanet signature spectroscopy, astrobiology, and more. Read latest news from SETI, NASA's JPL, and other leading institutions in the field.
16k subscribers53 posts / mo in Sep 2026 (incl. ~2% by known bots)21 authors / mosince 2010
r/exoplanets has 16k members (+24% over the last 12 months). It gets about 53 posts a month from 21 people. Top topics: Exoplanet Discoveries, Exoplanet Discoveries and Habitable Exoplanets.
When to post on r/exoplanets
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How r/exoplanets has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/exoplanets
Top topics
Share of the subreddit's posts
- Exoplanet Discoveries11%
- Exoplanet Discoveries9.8%
- Habitable Exoplanets6.9%
- Water Worlds & Exoplanet Atmospheres6.7%
- Interstellar Exploration2.1%
Brands people mention
Most-mentioned brands and sites, last 12 months
- arXiv.org e-Print archive
- NASA
- Institute of Physics
- AAS Nova
- Space
Everything else about r/exoplanets
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