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 105K members have joined in the past year. Popular discussion topics include Astronomy, Moon, and Nebula. 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: +105K members
Growth: +3.5% / 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: 61K members

Past year (monthly)

  • Jul: 6K members
  • Aug: 6K members
  • 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: 8K members

Topics

  • Astronomy
    51 posts in the past month
    #1
    Astronomy
    51
  • Moon
    38 posts in the past month
    #2
    Moon
    38
  • Nebula
    37 posts in the past month
    #3
    Nebula
    37
  • Telescope
    35 posts in the past month
    #4
    Telescope
    35
  • Galaxy
    24 posts in the past month
    #5
    Galaxy
    24

Flair

  • Astrophotography (OC)
    163 posts in the past month
    1. Venus Emerging From Behind the Moon Yesterday Through my Telescope.
    2. The rising Galactic Core shot on an iPhone
    3. Milky Way core over Mt. Hood (Lost Lake)
    #1
    Astrophotography (OC)
    Venus Emerging From Behind the Moon Yesterday Through my Telescope. · The rising Galactic Core shot on an iPhone · Milky Way core over Mt. Hood (Lost Lake)
    163
  • Discussion: [Topic]
    9 posts in the past month
    1. Mayon Volcano eruption in the Philippines, a meteorite can be seen falling behind the volcano
    2. Rest in Peace Alan Hale, co-discoverer of the greatest comet in a generation
    3. What is the bright spot above the Moon tonight ?
    #2
    Discussion: [Topic]
    Mayon Volcano eruption in the Philippines, a meteorite can be seen falling behind the volcano · Rest in Peace Alan Hale, co-discoverer of the greatest comet in a generation · What is the bright spot above the Moon tonight ?
    9
  • Astro Art (OC)
    9 posts in the past month
    1. I painted Gargantua's horizon
    2. Been working on a physics simulator.
    3. Procedural galaxies I rendered using my own Blender addon
    #3
    Astro Art (OC)
    I painted Gargantua's horizon · Been working on a physics simulator. · Procedural galaxies I rendered using my own Blender addon
    9
  • Astro Research
    7 posts in the past month
    1. Earth May Be Seeding Venus With Life, According to New Research
    2. The Cosmic Treasure Chest anomaly
    3. "Little red dot" in early Universe is a naked supermassive black hole
    #4
    Astro Research
    Earth May Be Seeding Venus With Life, According to New Research · The Cosmic Treasure Chest anomaly · "Little red dot" in early Universe is a naked supermassive black hole
    7
  • Object ID (Consult rules before posting)
    6 posts in the past month
    1. Seen over Columbus Ohio around 4:30 am 6/17/2026. What did I film?
    2. What type of satellites would cause this type of flaring?
    3. Odd vertical anomaly seen from plane.
    #5
    Object ID (Consult rules before posting)
    Seen over Columbus Ohio around 4:30 am 6/17/2026. What did I film? · What type of satellites would cause this type of flaring? · Odd vertical anomaly seen from plane.
    6

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 6/21/2026

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

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