this post was submitted on 18 Aug 2024
412 points (99.3% liked)
Lemmy Shitpost
26950 readers
3042 users here now
Welcome to Lemmy Shitpost. Here you can shitpost to your hearts content.
Anything and everything goes. Memes, Jokes, Vents and Banter. Though we still have to comply with lemmy.world instance rules. So behave!
Rules:
1. Be Respectful
Refrain from using harmful language pertaining to a protected characteristic: e.g. race, gender, sexuality, disability or religion.
Refrain from being argumentative when responding or commenting to posts/replies. Personal attacks are not welcome here.
...
2. No Illegal Content
Content that violates the law. Any post/comment found to be in breach of common law will be removed and given to the authorities if required.
That means:
-No promoting violence/threats against any individuals
-No CSA content or Revenge Porn
-No sharing private/personal information (Doxxing)
...
3. No Spam
Posting the same post, no matter the intent is against the rules.
-If you have posted content, please refrain from re-posting said content within this community.
-Do not spam posts with intent to harass, annoy, bully, advertise, scam or harm this community.
-No posting Scams/Advertisements/Phishing Links/IP Grabbers
-No Bots, Bots will be banned from the community.
...
4. No Porn/Explicit
Content
-Do not post explicit content. Lemmy.World is not the instance for NSFW content.
-Do not post Gore or Shock Content.
...
5. No Enciting Harassment,
Brigading, Doxxing or Witch Hunts
-Do not Brigade other Communities
-No calls to action against other communities/users within Lemmy or outside of Lemmy.
-No Witch Hunts against users/communities.
-No content that harasses members within or outside of the community.
...
6. NSFW should be behind NSFW tags.
-Content that is NSFW should be behind NSFW tags.
-Content that might be distressing should be kept behind NSFW tags.
...
If you see content that is a breach of the rules, please flag and report the comment and a moderator will take action where they can.
Also check out:
Partnered Communities:
1.Memes
10.LinuxMemes (Linux themed memes)
Reach out to
All communities included on the sidebar are to be made in compliance with the instance rules. Striker
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
🔥
You NASA folks just might be used to a challenge here and there:
Blow my mind with lunar soil in one sentence?
Not sure what will blow your mind but here’s some fun facts I feel like people don’t commonly know:
So earth has a moon which is covered in rock. Meteors slam into it which melts that rock together into very angular (sharp) rock glass.
Rocks on the moon don't just pile up a little bit. They might be 15 meters deep in certain craters. Almost as helpful as quicksand for those who want to walk or drive over it.
Some of the smallest rocks on the moon cause trouble for astronauts: statically charged dust. It sticks to people and equipment, and creative solutions (pulsingly charged wire grids) have been necessary to mitigate it.
Oh yeah - that’s cool!! Thanks for sharing :)
No problem! Glad you found it interesting :)
What could that glass be used for, other than building houses? Can you sink in the deeper parts like NASA feared when they send the first people up?
The glass just has high angularity like the other particles it comes from so while in and of itself it isn’t useful, highly angular particles make for better interlocking when made into cements.
And I don’t think they’re as worried about the depth of the dust in the highlands but it definitely makes exploring craters on foot impossible with the regolith present. You could absolutely get buried in it if the depth of the dust is 10m deep in some spots. We have a lot of concerns with the dust and how we can make long term survivable hardware which is part of what I worked on.
But the rovers with their oversized wheels are fine?
Theres some cool reasons behind that and I encourage you to look into it but the summary is that a lot of our rovers use those oversized wheels so they don’t sink and instead spread their weight over the top of it. The regolith does get more compact as you go down, so that also helps prevent sinking all the way to the bottom.
The other part is that both for rovers and astronauts we map out areas of high risk and avoid them. The Apollo astronauts landed in a specific spot and had certain areas to explore for that exact reason.
Then when it comes to the LRV (the moon buggy) that we brought up there, that thing has very lightweight tires that are essentially just mesh wire. Helps to spread the load and they deform easily to get better traction in the loose rock.
I had the pleasure of handling engineering replicas of the tires on the LRV and also newer generation martian rover tires. Including another engineering sample of the wheels on perseverance. NASA has a giant soil bin with a material that mimics the regolith that they use to test those wheels to prevent the rovers from sinking. Basically just attaching the wheels to a fake rover rig, loading it with weights, and then they drive it and track it in real time 3D space to measure slip and sinkage and all that.
Very cool that you were able to handle these. Definetly envious :D
Thanks for the insights
Definitely one of the highlights of being there, and you’re welcome!
So cool!