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r/Mars

The Mars Subreddit. Articles and discussion about the planet Mars. What's going on? What's going on? We're going dark until further notice to protest reddit's new policies. Read more here (archived snap of the post): https://teddit.net/r/Save3rdPartyApps/comments/13yh0jf/dont_let_reddit_kill_3rd_party_apps/ We hope to see you all again soon. Founded 2008 · 98.7K members

95.3K members. The best post we have captured here reached 11.8K upvotes, which works out to 124 per 1,000 members.

124peak upvotes per 1,000 members
95.3Kmembers
11.8Kbest post
1.5Kmost comments
200posts we track

Open r/Mars on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

46% 32% 12%
Image 46% Link 32% Video 12% Gallery 6% Text 3% Question 3%

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Olympus Mons: The biggest volcano in our star system!

↑ 11.8K 💬 177 image 2025

Mars

↑ 8.9K 💬 80 image 2026

Mars on the left, Earth on the right.

↑ 7.7K 💬 273 image 2024

Water ice on Mars, shot by the ESA

↑ 5.1K 💬 136 image 2024

Made something like google earth but on mars.

↑ 4.6K 💬 184 video 2021

Olympus Mons: Giant Mountain of Mars

↑ 4K 💬 92 gallery 2026

Clearest image ever taken of Mars' North Pole. Yes that's water ice.

↑ 3.2K 💬 121 image 2026

Probably a dumb question but I feel like it's the best place to ask, what are realistically the reasons to colonize Mars ?

↑ 3.2K 💬 1.5K image 2026

Curiosity wheels taken yesterday, showing the damages caused during the 13 years it has been on the Red Planet

↑ 3.1K 💬 117 image 2026

2 NEW epic images of Phobos over Mars just released by Mars Express. Processed by Andrea Luck

↑ 3K 💬 42 gallery 2025

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

r/Mars, in numbers

Answered from the posts ViralHunt holds from this community, not from Reddit's own about page.

What is r/Mars?
r/Mars ("The Mars Subreddit") describes itself this way: Articles and discussion about the planet Mars. What's going on? What's going on? We're going dark until further notice to protest reddit's new policies. Read more here (archived snap of the post): https://teddit.net/r/Save3rdPartyApps/comments/13yh0jf/dont_let_reddit_kill_3rd_party_apps/ We hope to see you all again soon. It was founded in 2008 and has 98.7K members.
How many members does r/Mars have?
r/Mars has about 95.3K members. ViralHunt has tracked 200 of its posts; the biggest reached 11.8K upvotes, which is 124 per 1,000 members.
What is the most viral post on r/Mars?
"Olympus Mons: The biggest volcano in our star system!" reached 11.8K upvotes and 177 comments in 2025, the highest score among the posts we hold from r/Mars.
What subreddits are similar to r/Mars?
Communities of a comparable size we track: r/greenland, r/Leakednews, r/LetsDiscussThis, r/stevehofstetter, r/StrikeAtPsyche, r/InvictaSolaris.
What kind of posts do best on r/Mars?
Of the posts we hold, 46% are image posts and 32% are link posts.
When is the best time to post on r/Mars?
Across 200 timestamped posts we hold, the slots whose posts averaged the highest score are Sunday at 13:00 UTC (3.1K avg upvotes), Saturday at 01:00 UTC (3K avg upvotes), Sunday at 23:00 UTC (2.1K avg upvotes). The busiest day is Sunday. For Reddit as a whole, see the best time to post on Reddit page.
How many upvotes does a post need to reach the top of r/Mars?
The 20th-best post we hold from r/Mars has 1.5K upvotes, so that is roughly the bar for the top twenty.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

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Every figure here is what ViralHunt has captured from r/Mars, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.