Communities related to r/AskPhysics, with what each one is for and how it differs. Member figures come from SubMouse's safe-for-work directory.
r/AskPhysics (about 1.6M members, directory rank #669) is for physics questions, with rules against cheating and AI fluff. Physics community discussion and broader science Q&A live elsewhere.
See also physics vs askphysics on SubMouse.
Stay on AskPhysics for physics questions and problem help. Use Physics for physics community discussion, askscience for moderated science answers across fields, and science for science news and papers.
r/AskPhysics — Ask Physics
Physics
When to choose it: Physics community discussion rather than a question helpdesk.
Why it is here: Paired on physics vs askphysics; listed as related (about 3.3M members, rank #320).
How it differs from r/AskPhysics: Community/discussion hub versus AskPhysics Q&A format.
AskScience: Got Questions? Get Answers.
When to choose it: Moderated science answers across disciplines, not only physics.
Why it is here: Listed among Ask* related neighbourhood rooms (about 26.4M members, rank #20).
How it differs from r/AskPhysics: Multi-field science Q&A versus physics-only AskPhysics.
Reddit Science
When to choose it: Science news and research discussion.
Why it is here: Broader science hub (about 34.6M members, rank #11).
How it differs from r/AskPhysics: News/research focus versus physics question threads.
Use the related subreddits finder for r/AskPhysics: Find related to r/AskPhysics.
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 2026-11-07.