r/space↗
/r/space: news, articles and discussion
Share & discuss informative content on: * Astrophysics * Cosmology * Space Exploration * Planetary Science * Astrobiology
28M subscribers762 posts / mo in Sep 2026 (incl. ~4% by known bots)510 authors / mosince 2008
r/space has 28M members (+0.8% over the last 12 months). It gets about 762 posts a month from 510 people. Top topics: Artemis Missions, Exoplanet Discoveries and Exoplanet Discoveries.
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How r/space has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/space
Top topics
Share of the subreddit's posts
- Artemis Missions0.4%
- Exoplanet Discoveries0.4%
- Exoplanet Discoveries0.4%
- Rosetta Comet Mission0.4%
- Curiosity Rover Updates0.4%
Brands people mention
Most-mentioned brands and sites, last 12 months
- European Space Agency
- arXiv.org e-Print archive
- Nature
- xkcd
- Wikimedia
Everything else about r/space
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