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 3.2M members. It uses a forum format for communication. It is the 1st largest community in the Astronomy topic page.

Roughly 121K members have joined in the past year. Popular discussion topics include Astronomy, Telescope, and Looking For. Product recommendations often mention telescope and books.

On Reddit
3.2M Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +121K members
Growth: +4.0% / 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: 104K members

Past year (monthly)

  • 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: 16K members
  • Sep: 7K members
  • Oct: 6K members
  • Nov: 3K members

Topics

  • Astronomy
    52 posts in the past month
    #1
    Astronomy
    52
  • Telescope
    20 posts in the past month
    #2
    Telescope
    20
  • 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)
    44 posts in the past month
    1. Early autumn Milky Way
    2. 2024 total solar eclipse composite
    3. Crescent Nebula
    #1
    Astrophotography (OC)
    Early autumn Milky Way · 2024 total solar eclipse composite · Crescent Nebula
    44
  • Other: [Topic]
    11 posts in the past month
    1. Astronomer here! Big news- I am a winner this year for the Wendy and Eric Schmidt Awards for Excellence in Science Communications, in large part for my work on Reddit!!!
    2. “Live” Orion Nebula Night Vision
    3. Night of the Comet - 1986 BBC Coverage of the Giotto Halley Encounter
    #2
    Other: [Topic]
    Astronomer here! Big news- I am a winner this year for the Wendy and Eric Schmidt Awards for Excellence in Science Communications, in large part for my work on Reddit!!! · “Live” Orion Nebula Night Vision · Night of the Comet - 1986 BBC Coverage of the Giotto Halley Encounter
    11
  • Discussion: [Topic]
    9 posts in the past month
    1. Eclipse on Callisto Tonight.
    2. I hosted a mini-star party at my local punk bar
    3. What got you into astronomy?
    #3
    Discussion: [Topic]
    Eclipse on Callisto Tonight. · I hosted a mini-star party at my local punk bar · What got you into astronomy?
    9
  • Astro Research
    8 posts in the past month
    1. A particle from the dawn of time that physicists often ignore may explain why everything in the universe exists
    2. Eccentricity dynamics of the solar system
    3. An enormous 'Cat's Tail' tells of cosmic collision 63 light-years away
    #4
    Astro Research
    A particle from the dawn of time that physicists often ignore may explain why everything in the universe exists · Eccentricity dynamics of the solar system · An enormous 'Cat's Tail' tells of cosmic collision 63 light-years away
    8
  • Question (Describe all previous attempts to learn / understand)
    5 posts in the past month
    1. Black Hole Documentary for High School
    2. Planeten auf Wandbild
    3. Do the Line Features Have a Name?
    #5
    Question (Describe all previous attempts to learn / understand)
    Black Hole Documentary for High School · Planeten auf Wandbild · Do the Line Features Have a Name?
    5

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 10/30/2026

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 3.2M 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

23
Views /mo
(+64%)
23
Visitors /mo
(+77%)
0
Referrals /mo
(-100%)

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