r/RealSolarSystem↗
KSP - Real Solar System Mod
The official subreddit for the Real Solar System, Realism Overhaul and RP-0 mods for Kerbal Space Program.
18k subscribers88 posts / mo in Sep 202656 authors / mosince 2013
r/RealSolarSystem has 18k members (+27% over the last 12 months). It gets about 88 posts a month from 56 people. Top topics: KSP Mods, Moon Missions and Orbit and Transfer Mechanics.
When to post on r/RealSolarSystem
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How r/RealSolarSystem has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/RealSolarSystem
Top topics
Share of the subreddit's posts
- KSP Mods14%
- Moon Missions3.6%
- Orbit and Transfer Mechanics2.6%
- Rocket Staging Issues2.0%
- Rocket Launches and Design2.0%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Kerbal Space Program
- Substack
- NASA
- SpaceDock
- Encyclopedia Astronautica
Everything else about r/RealSolarSystem
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