r/Mars↗
The Mars Subreddit
Articles and discussion about the planet Mars. What's going on? What's going on? We're going dark until further notice to protest reddit's new policies. Read more here (archived snap of the post): https://teddit.net/r/Save3rdPartyApps/comments/13yh0jf/dont_let_reddit_kill_3rd_party_apps/ We hope to see you all again soon.
100k subscribers173 posts / mo in Sep 2026 (incl. ~1% by known bots)86 authors / mosince 2008
r/Mars has 100k members (+29% over the last 12 months). It gets about 173 posts a month from 86 people. Top topics: Mars Life Search, Mars Water Exploration and Mars Colonization & Terraforming.
When to post on r/Mars
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How r/Mars has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/Mars
Top topics
Share of the subreddit's posts
- Mars Life Search4.6%
- Mars Water Exploration4.4%
- Mars Colonization & Terraforming4.1%
- Mars Imagery2.9%
- Mars Colonization2.7%
Brands people mention
Most-mentioned brands and sites, last 12 months
- NASA
- HiRISE
- Bluesky Social
- Bluesky
- European Space Agency
Everything else about r/Mars
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