r/askastronomy
182k members
r/askastronomy is a subreddit with 182k 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?, planetary science, astrophysics, and sci-fi.
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
: "What would the ramifications be if this nebula was actually this close to earth?"
19 posts
#2
What did I see?
: "Seen a year ago above Wadi Rum, Jordan"
12 posts
#3
Planetary Science
: "Mars-Earth-Venus atmospheres"
8 posts
#4
Astrophysics
: "If all mass after the big bang expanded outward and gravity pulls inward then why do we have anything other than a singularity?"
7 posts
#5
Sci-Fi
: "Chances that humanity is first in the universe?"
5 posts
#6
Cosmology
: "If our entire solar system were somehow ejected from the Milky Way into intergalactic space, would it make any difference to us?"
3 posts
#7
Black Holes
: "TON 618: How Does the Universe Build a Black Hole This Massive?"
1 post
Member Growth in r/askastronomy
Yearly
+54k members(42.0%)
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About
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Last updated: September 7, 2026