// subreddit stats

r/space

How big r/space is, how busy it is, what its rules say, who posts most, and when its readers are online.

Live data, refreshed daily

Subscribers
28M
Created
2008
Posts / day
26.4
Comments / day

GeneralShare & discuss informative content on: * Astrophysics * Cosmology * Space Exploration * Planetary Science * Astrobiology

Best time to post in r/space

When readers are commenting is when a new post gets seen. Busiest for posts: Sun 12pm UTC, Sun 3pm UTC, Sun 1pm UTC. Times below are shown in your timezone.

Posting activity · UTC

Busiest: Sun 12pm, Sun 3pm, Sun 1pm.

r/space rules

  1. 1.

    Submissions must be related to Space/Cosmology

    This includes "circlejerky" submissions or space-related art, with the exception of art from space agencies or historically-significant art.

  2. 2.

    No sensationalist/misleading/unscientific content or titles

    Post titles need to be descriptive and non-clickbait. When submitting images titles need to accurately describe the content of the image (e.g. if an image is a composite this needs to be clearly stated), and without attempting to draw in upvotes or comments. The image should stand on it's own.

  3. 3.

    No spam/blogspam/paywalled/pirated content

    This also means that news articles should be a top-level source.

  4. 4.

    No petitions/surveys/crowdfunding

    News articles about space-related crowdfunding campaigns are allowed, but direct links to crowdfunding campaigns, petitions or surveys are not allowed.

  5. 5.

    No social media links

    No social media links such as Facebook, Instagram, Twitter, etc. Exception: Twitter links are allowed for breaking news by official sources. This does not include YouTube videos, which are allowed as long as they follow the other rules.

  6. 6.

    No duplicate or re-hosted content

  7. 7.

    Images are only allowed on Sunday UTC

    Images, gifs, and gif-like videos (those under 2 minutes and which don't rely on sound) are permitted only on Sundays UTC. Please no DALL·E mini or other AI generated images.

  8. 8.

    No low-effort or meme images are permitted at any time.

  9. 9.

    If an image is not OC you must give credit to the original photographer.

    This applies even if the source is a space agency such as NASA or ESA.

  10. 10.

    No low-effort/meme/joke/troll/insult comments

  11. 11.

    No unscientific or anti-scientific comments

  12. 12.

    Straightforward questions belong in the Space Questions Thread

    Straightforward questions (who/what/where) belong to the Weekly Space Questions thread (pinned at the top).

  13. 13.

    Please limit yourself to no more than 5 submissions per 24 hour period.

  14. 14.

    No AI generated content

    This includes both AI generated images/artwork and text generated by tools such as ChatGPT. Articles and videos that are obviously AI generated will also be removed.

Check a post against these rules

Related subreddits

Want customers from r/space?

Rankcow finds the buyer-intent threads there, writes the reply, checks the rules, and posts. On autopilot.

Start For $0