this post was submitted on 01 Apr 2026
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Today I Learned

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Mars elevation map (discuss.tchncs.de)
submitted 5 days ago* (last edited 5 days ago) by gandalf_der_12te@discuss.tchncs.de to c/til@lemmy.world
 

Shows the elevation of the martian landscape.

red = hill, blue = valley

the big blue crater at 60°E, 45°S is probably an old impact crater from an asteroid and is 4 km deep!

The highest mountain on Mars is olympus mons at 20°N, 130°W with an altitude of 21 km above planet-wide average.

Source: NASA, Mars Orbiter Laser Altimeter

Also we have a whole Mars community here: !mars@discuss.tchncs.de
In case you want to know more about the planet, please feel free to ask :)

top 18 comments
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[–] cattywampas@lemmy.world 22 points 5 days ago (3 children)

Fun fact, Olympus Mons is so wide and its slope so gradual that you would never be able to see the whole thing from a distance and would scarcely even know you were walking uphill were you to climb it.

[–] starlinguk@lemmy.world 13 points 5 days ago (3 children)

I bet a participant in the tour de, er, Mars would notice. It's what's called a "vals plat" in Dutch, a stretch that seems flat but is surprisingly hard to cycle on.

[–] TargaryenTKE@lemmy.world 4 points 5 days ago

I'm assuming the rough translation is "false flat" right?

[–] Greg@lemmy.ca 3 points 5 days ago* (last edited 5 days ago) (1 children)

I think the slope would be the least of your concerns if you found yourself cycling around mars

[–] TachyonTele@piefed.social 11 points 5 days ago (1 children)

True. Not a lot of bike shops around if you get a flat.

[–] starlinguk@lemmy.world 2 points 5 days ago (1 children)

You have to have one of those little baggies with repair stuff on the back of your saddle.

[–] TachyonTele@piefed.social 1 points 5 days ago (1 children)

I'd bring a phone too. Then you could see which stores are open to get a bite at. Because biking is tiring!

[–] starlinguk@lemmy.world 1 points 5 days ago

I suggest you bring a snack.

[–] ClockworkOtter@lemmy.world 1 points 5 days ago

Like living somewhere coastal where it feels like you have a headwind going to and from work.

[–] starik@lemmy.zip 2 points 5 days ago

After climbing the 6 kilometer high cliff

[–] mcv@lemmy.zip 1 points 5 days ago

It may be 25 (21?) km tall, but it's also the size of France.

[–] EpeeGnome@feddit.online 10 points 5 days ago (1 children)

Whenever I see an elevation map of Mars I can't help but see that one entire hemisphere is lower and the other higher, and I wonder if maybe we just misjudged the correct location of the middle. Maybe something to do with the gravitational center vs the volumetric center. I'm sure there's more to it, but I always find it striking, and never have seen an explanation of what feels like a discrepancy to my intuition.

sorry for the late reply. yes it is indeed a difference between volumetric and gravitational center. there's speculation that such a shift could have been caused by a big-enough asteroid impact, for example the one which left a big crater at 60°E, 45°S. It could have shifted the somewhat heavier core of the planet sideways, thus shifting the gravitational center away from the volumetric center.

Kinda wild how relatively boring a map is when there's no evident tectonics

[–] Shirasho@lemmings.world 2 points 5 days ago

4km deep? Is this where subnautica 2 will take place?

[–] TachyonTele@piefed.social 2 points 5 days ago

I enjoyed playing maps in Civ 4 based on Mars relief maps. Fun times. I hope every version of the game gets maps like those

[–] ChicoSuave@lemmy.world 1 points 5 days ago (1 children)

It looks like Mars was impacted by something that bumped out Olympus Mons but erosion made the crater a bowl and the mountain a bump. Probably something we won't solve until we're on Mars but something neat to think about.

That is actually what scientists speculate, too! It is noteworthy that the big crater at 60°E, 45°S is almost directly on the other side of the planet as the big mountains near olympus mons, so it's easy to guess that the same impact that caused the crater, also pushed the mountains up. But, it's speculation. i don't know for sure.