Communities related to r/space, with what each one is for and how it differs. Member figures come from SubMouse's safe-for-work directory.
r/space covers informative astrophysics, cosmology, exploration and planetary science. Hobby observing and imaging have dedicated rooms with different norms.
Decorative “space” aesthetic related hits are omitted.
Stay on space for science/exploration articles and discussion. Use Astronomy for amateur observing culture and astrophotography for sharing amateur space images.
r/space — /r/space: news, articles and discussion
Share & discuss informative content on: * Astrophysics * Cosmology * Space Exploration * Planetary Science * Astrobiology
Astronomy
When to choose it: You care about observing, amateur practice and celestial hobby talk.
Why it is here: Topical sibling. Public description: amateur hobby and scientific study of celestial objects.
How it differs from r/space: Hobby/observing emphasis versus mission/science news mix on space.
Amateur Astrophotography
When to choose it: You are sharing or discussing amateur space photography.
Why it is here: Topical sibling. Public description celebrates amateur astrophotography and member work.
How it differs from r/space: Imaging craft versus general space science.
Use the related subreddits finder for r/space: Find related to r/space.
Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-09 UTC); 7-day growth measured from 2026-11-02. Directory rank is listing order. Guide updated 2026-11-06.