Most popular subreddits

r/space stats

r/space has 27,990,849 members and gets about 10.8 new posts a day. The best time to post is Sunday around 2pm US Eastern.

Members
28.0M
Posts per day
10.8
Avg comments
42.6
Created
2008

From the subreddit: Share & discuss informative content on: * Astrophysics * Cosmology * Space Exploration * Planetary Science * Astrobiology

Best time to post on r/space

When this month's top 100 posts went up, weighted by score. Times are US Eastern.

  1. #1

    Sun 2pm

  2. #2

    Wed 6pm

  3. #3

    Sun 5pm

12am3am6am9am12pm3pm6pm9pm
Sun
Mon
Tue
Wed
Thu
Fri
Sat

Top posts this month

Who buys on r/space

The largest communities on Reddit by members. Huge reach, but rarely where buyers ask for help; useful for audience research and timing, not for leads.

Find buyers in r/space

Leadhoot watches r/space, scores every new post 0–100 for buyer intent, and alerts you within a minute of the ones asking for what you sell.

Watch r/space

Related subreddits

Common questions

r/space has 27,990,849 members, read from Reddit on October 28, 2026.

Based on when this month's top posts went up, Sunday around 2pm US Eastern. Check the heatmap for runner-up slots.

It gets about 10.8 new posts a day, and a new post averages 42.6 comments.

Read the subreddit rules first; most business subreddits remove promotional posts. What works is answering posts where someone asks for help, being genuinely useful, and disclosing when you mention your own product.

Watch for posts where someone asks for a recommendation, a quote, or an alternative to a tool. Leadhoot watches r/space for you, scores every new post 0–100 for buyer intent, and alerts you within a minute of the high scorers.

Data read from Reddit's public API and refreshed weekly. Check any subreddit.