r/askastronomy
168k members
r/askastronomy is a subreddit with 168k members. The community frequently discusses astronomy, sky, stars, moon, and space, and they frequently recommend/review telescope and cameras, and the most common flair used is astronomy , what did i see?, black holes, astrophysics, and planetary science.
For your astronomy-related questions and content!
Popular Topics in r/askastronomy
#1
Astronomy
53 posts
#2
Sky
41 posts
#3
Stars
31 posts
#4
Moon
29 posts
#5
Space
25 posts
#6
Telescope
24 posts
#7
Star
23 posts
#8
Planets
17 posts
#9
Object
17 posts
#10
What
17 posts
Products Discussed in r/askastronomy
Flair Used in r/askastronomy
#1
Astronomy
: "How did scientists expect aliens to understand the Voyager Golden Record?"
41 posts
#2
What did I see?
: "Facing west, what planet is this likely to be shining brighter than the rest?"
20 posts
#3
Black Holes
: "Do black holes have solid surfaces, or are they like our gas giants?"
14 posts
#4
Astrophysics
: "Where is the edge of the universe?"
11 posts
#5
Planetary Science
: "Milky Way from Mars"
9 posts
#6
Cosmology
: "Is dark matter structural?"
4 posts
#7
Sci-Fi
: "What would happen if G was much smaller?"
2 posts
Member Growth in r/askastronomy
Yearly
+46k members(38.3%)
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About
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Last updated: June 10, 2026