r/blackholes↗
BlackHoles
A place to post and ask questions about the phenomena known as Black Holes
15k subscribers49 posts / mo in Sep 202640 authors / mosince 2011
r/blackholes has 15k members. It gets about 49 posts a month from 40 people. Top topics: Black Holes, Big Bang Theory and Interstellar Theories.
When to post on r/blackholes
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How r/blackholes has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/blackholes
Top topics
Share of the subreddit's posts
- Black Holes10%
- Big Bang Theory0.7%
- Interstellar Theories0.3%
Brands people mention
Most-mentioned brands and sites, last 12 months
- arXiv.org e-Print archive
- Doi
- Institute of Physics
- American Physical Society
- Nature
Everything else about r/blackholes
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