198 posts analyzed Updated Jul 2026
Averages 6 posts/day, top 25% activity. Most active Sundays around 9 AM UTC. Mostly text posts (57%).
r/astrophysics Traffic & Engagement r/astrophysics Traffic & Engagement
Volume and engagement over time Posting volume and engagement over time
Post Format
Upvote Distribution
How upvoted posts perform Only posts with 2+ upvotes. The bands below show how those posts are spread by upvote count.
r/astrophysics Most Active Times When r/astrophysics Is Most Active
Peak posting by day and hour (UTC) When this community posts most, by day and hour (UTC)
Most Active by Day
r/astrophysics Flair Performance r/astrophysics Flair Performance
Upvotes and volume by flair Average upvotes and post volume by flair
This subreddit doesn't use post flairs.
No flaired posts were found in this month's data.
Post Type Breakdown
Share by text, image, or link Share of posts by format: text, image, or link
r/astrophysics Trending Keywords Trending Keywords in r/astrophysics
Ranked by how often they appear Title keywords ranked by how often they appear
| Keyword | Mentions ▼ | Upvotes | Comments |
|---|---|---|---|
| astrophysics | 30 (15.2%) | 7 | 6 |
| universe | 14 (7.1%) | 9 | 11 |
| black | 13 (6.6%) | 8 | 6 |
| hole | 13 (6.6%) | 8 | 6 |
| space | 11 (5.6%) | 31 | 9 |
| theory | 10 (5.0%) | 6 | 6 |
r/astrophysics Mentioned Domains Mentioned Domains in r/astrophysics
Most linked sites Most linked sites in this subreddit
| Domain | Links | Upvotes |
|---|---|---|
| youtube.com | 5 | 1 |
| phys.org | 3 | 6 |
r/astrophysics Top Posts Top Performing Posts in r/astrophysics
Highest-performing posts Highest-performing posts. Each title links to Reddit.
This size comparison is real, but the more remarkable fact is one the image doesn't mention at all: these three stars aren't actually anywhere near each other in space.
Carl Sagan on Military Spending and Climate Change
Simulation of a collision between two massive bodies
Hubble tension?
'It's going to do things that currently are impossible.' The Roman Space Telescope, NASA's next great observatory, is ready to launch Aug. 30
Einstein’s greatest theory triumphs again in landmark frame-dragging measurement
How to survive while getting a PhD in astrophysics?
Science educators (like Brian Cox) bring up Einstein as if most, if not all, of his theories are still 100% valid 110 years later. Are they?
I built a CUDA-accelerated black hole raytracer for my master's thesis - would love feedback and collaborators
What is this?
r/astrophysics Audience Overlap r/astrophysics Subreddit Overlap & Related Communities
Overlapping audiences Communities with overlapping audiences
r/astrophysics FAQ Frequently Asked Questions About r/astrophysics
What's the best time to post on r/astrophysics?
Based on posting volume, r/astrophysics is most active on Sundays around 9 AM UTC. That window has the most community activity, but busier hours also mean more competition for attention.
How active is r/astrophysics?
r/astrophysics averages 6 posts per day and ranks in the top 25% for activity among tracked SFW subreddits.
How many upvotes do posts on r/astrophysics get?
Posts on r/astrophysics average about 9 upvotes this month (net score per post).
What kind of posts does r/astrophysics get most?
On r/astrophysics, most posts are text posts (57%)