r/Astronomy

Community Overview
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About r/Astronomy

The amateur hobby of humanity since the dawn of time and scientific study of celestial objects.

The community at a glance

r/Astronomy is a Subreddit for Astronomers with roughly 3.1M members. It uses a forum format for communication. It is the 1st largest community in the Astronomy topic page.

Roughly 118K members have joined in the past year. Popular discussion topics include Astronomy, Telescope, and Looking For. Common discussion themes are Advice Requests and Self-Promotion. Product recommendations often mention telescope and books.

On Reddit
3.1M Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +118K members
Growth: +3.9% / year

Member growth over time

All time (yearly)

  • 2013: 27K members
  • 2014: 30K members
  • 2015: 18K members
  • 2016: 27K members
  • 2017: 95K members
  • 2018: 370K members
  • 2019: 431K members
  • 2020: 695K members
  • 2021: 462K members
  • 2022: 480K members
  • 2023: 194K members
  • 2024: 87K members
  • 2025: 77K members
  • 2026: 84K members

Past year (monthly)

  • Sep: 5K members
  • Oct: 6K members
  • Nov: 12K members
  • Dec: 9K members
  • Jan: 9K members
  • Feb: 8K members
  • Mar: 10K members
  • Apr: 16K members
  • May: 10K members
  • Jun: 11K members
  • Jul: 9K members
  • Aug: 11K members

Themes

  • Advice Requests
    3 posts in the past month
    1. Is this Mercury or another planet? (during today's eclipse in Edinburgh)
    2. Looking for an astronomy enthusiast to surprise my 7-year-old son
    3. Question: Why does the three-body problem not affect our ability to predict eclipses given the sun, moon, and earth are involved?
    #1
    Advice Requests
    Is this Mercury or another planet? (during today's eclipse in Edinburgh) · Looking for an astronomy enthusiast to surprise my 7-year-old son · Question: Why does the three-body problem not affect our ability to predict eclipses given the sun, moon, and earth are involved?
    3
  • Self-Promotion
    1 post in the past month
    1. I made an software to track everything astronomy, but ended up publishing it. Looking for feedback!
    #2
    Self-Promotion
    I made an software to track everything astronomy, but ended up publishing it. Looking for feedback!
    1
  • Solution Requests
    1 post in the past month
    1. Is there a tool that can work out eclipses in history?
    #3
    Solution Requests
    Is there a tool that can work out eclipses in history?
    1

Topics

  • Astronomy
    41 posts in the past month
    #1
    Astronomy
    41
  • Telescope
    18 posts in the past month
    #2
    Telescope
    18
  • Looking For
    17 posts in the past month
    #3
    Looking For
    17
  • Stars
    13 posts in the past month
    #4
    Stars
    13
  • Struggling
    12 posts in the past month
    #5
    Struggling
    12

Flair

  • Astrophotography (OC)
    122 posts in the past month
    1. 1 second after totality
    2. Saturn, with a Tethys transit & its shadow
    3. Andromeda Galaxy
    #1
    Astrophotography (OC)
    1 second after totality · Saturn, with a Tethys transit & its shadow · Andromeda Galaxy
    122
  • Other: [Topic]
    22 posts in the past month
    1. Who's ready for today's eclipse?
    2. PHYS.Org: Astronomers catch massive star's death from the first explosive moment
    3. In Palma Mallorca for eclipse. Where to watch?
    #2
    Other: [Topic]
    Who's ready for today's eclipse? · PHYS.Org: Astronomers catch massive star's death from the first explosive moment · In Palma Mallorca for eclipse. Where to watch?
    22
  • Discussion: [Topic]
    20 posts in the past month
    1. Am I high or there is a new supernova near 21Cyg?
    2. The night sky today vs a few years ago
    3. How much horizon do you actually need? Totality in Spain on the 12th is 12 degrees up at best.
    #3
    Discussion: [Topic]
    Am I high or there is a new supernova near 21Cyg? · The night sky today vs a few years ago · How much horizon do you actually need? Totality in Spain on the 12th is 12 degrees up at best.
    20
  • Question (Describe all previous attempts to learn / understand)
    9 posts in the past month
    1. Can an expert quickly set this straight for me please?
    2. I am going insane ove this.
    3. August 12th events
    #4
    Question (Describe all previous attempts to learn / understand)
    Can an expert quickly set this straight for me please? · I am going insane ove this. · August 12th events
    9
  • Astro Art (OC)
    8 posts in the past month
    1. Realistic photos of total eclipse of Sun
    2. Total solar eclipse on a mountain in the North of spain
    3. First time capturing the night sky
    #5
    Astro Art (OC)
    Realistic photos of total eclipse of Sun · Total solar eclipse on a mountain in the North of spain · First time capturing the night sky
    8

Product recommendations

  • telescope
    10 posts in the past month
    1. Best beginner telescope?
    2. Can anyone recommend a telescope around €300 for a beginner?
    3. Just starting Astrophotography, Which telescope out of these would you recommend?
    #1
    telescope
    Best beginner telescope? · Can anyone recommend a telescope around €300 for a beginner? · Just starting Astrophotography, Which telescope out of these would you recommend?
    10
  • books
    6 posts in the past month
    1. Best astronomy books and recommendation☄🌌
    2. What books would you recommend to a novice who's interested in learning more about Astronomy?
    3. Recommend book for astronomy basic calculation
    #2
    books
    Best astronomy books and recommendation☄🌌 · What books would you recommend to a novice who's interested in learning more about Astronomy? · Recommend book for astronomy basic calculation
    6
View full analysis on GummySearchSynced 8/13/2026

Frequently asked questions

Who is r/Astronomy for?
Best for Astronomers enthusiasts looking for a Reddit-based community with forum discussion.
Is r/Astronomy free to join?
This listing is not marked as paid-only. Access rules and any fees are decided by the community.
How many members does r/Astronomy have?
Roughly 3.1M members, based on figures reported by the community or its host. Member counts are approximate and change over time.
What platform is r/Astronomy on?
r/Astronomy runs on Reddit. Reddit communities (or "subreddits") are forum-based groups on the popular social news aggregation, web content rating, and discussion website Reddit. Reddit is commonly known as "the front page of the internet". Users submit content to the site such as links, text posts, and images, which are then voted up or down and discussed by other members. From investing Reddit communities, to professional ones, to ones just for laughs, you're likely to find a community for you on Reddit.
What topics does r/Astronomy cover?
On the Hive Index, r/Astronomy is organized under Astronomers.
How do I join r/Astronomy?
You can join r/Astronomy by clicking this link, or pressing the "Go to community" button above.
What are the Astronomy communities like?
Communities for space enthusiasts covering astronomy, astrophysics, astrophotography, and space exploration. Discord servers host newcomers and experts alike with dedicated channels for launches, telescope recommendations, and trivia, alongside Reddit communities for sharing images and discussing discoveries.
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Added 6/8/2023

Monthly Stats

9
Views /mo
(-31%)
8
Visitors /mo
(0%)
0
Referrals /mo
(-100%)

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