r/askastronomy
173k members
r/askastronomy is a subreddit with 173k 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?, astrophysics, planetary science, and black holes.
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
: "This might be dumb question but why can't we just send ISS into the Sun?"
44 posts
#2
What did I see?
: "First Astrophoto from Phone"
20 posts
#3
Astrophysics
: "How could a single object like Quasar emit more energy than the entire galaxy with hundreds of bilions of stars? I know scientists say it's true and proven but my brain just refuses to comprehend it"
12 posts
#4
Planetary Science
: "What would happen if a massive asteroid collided with a gas giant like Jupiter?"
11 posts
#5
Black Holes
: "A Note on the Term "Black Hole""
3 posts
#6
Sci-Fi
: "Say I got teleported to a random point in the universe,could I even find my way back to Earth? I don't think people think how broken this question actually is."
2 posts
#7
Cosmology
: "Realistically, if an interstellar traveler came at us at the same size and speed as Oumuamua and hit Mars directly. What would happen to our solar system?"
2 posts
Member Growth in r/askastronomy
Yearly
+49k members(39.1%)
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Last updated: July 24, 2026