bran6030
2.3K posts

bran6030
@burnthefash
followers get blocked, I'm not interested in a lasting presence here.
80 years free from nаzi scum Katılım Ağustos 2019
646 Takip Edilen0 Takipçiler

@alexboge @gomni1807 well, depending on how far from an IR source you are
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@alexboge @gomni1807 once heard someone say that space is both very cold and very hot- you have a ton of heat to lose, but nothing to lose it to except infrared radiation, and the average thermal energy of particles around you may be very high, but there are very very few of them
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A tiny little scene in Season 1, Episode 6 of The Expanse shows Uncle Mateo, a Belter, popping open his helmet for a few seconds to yank out a sparking sensor wire that had come loose inside his helmet.
He takes a big breath first to better oxygenate his bloodstream, then begins exhaling steadily as he opens the helmet. He pulls the wire, seals it, and repressurizes - and he's fine. It always got me thinking how over-the-top Hollywood usually makes exposure to vacuum in movies.
But this scene actually gets the science right. (Note: In real spacesuits you can't open a helmet like this - the pressurized bubble stays sealed. But the physics of what would happen if you could is still fascinating.)
You MUST exhale steadily, and here's why:
The reason is Boyle's Law. When external pressure drops to zero, the air trapped in your lungs wants to expand dramatically. Even at only 4.3 psi inside the suit, that creates a huge unbalanced pressure pushing outward against the delicate alveoli. On Earth a big breath is safe because pressure is equal on both sides. In vacuum it's not - the alveoli can tear, sending air bubbles into your blood (an arterial gas embolism that can hit your brain or heart). Game over.
Even if you somehow held it, you couldn't use the oxygen anyway. In vacuum the pressure gradient reverses and your lungs start stripping oxygen out of your blood.
So you take that big breath to load up your bloodstream with extra oxygen, then you begin a steady exhale as you open the helmet, and…
- 0–2 seconds: What little bit of air is left rushes out of your lungs.
- 3–5 seconds: Your saliva starts fizzing and boiling on your tongue - that weird, carbonated, Pop-Rocks feeling.
If you stay exposed without resealing: In 10–15 seconds you black out from lack of oxygen. Once you pass out, your face and body start swelling from water vapor forming in the tissues. Not the dramatic explosion of bad sci-fi - more like severe bloating, and it reverses almost completely once you repressurize.
But you could last unconscious for up to approximately three minutes. Should someone reach you, seal your helmet, and repressurize, you'd have a surprisingly good chance at recovering.
Uncle Mateo was fine. His exposure was very brief. He exhaled, and as a Belter, he'd probably become used to that mild Pop-Rocks feeling.
NASA proved all of this with real tests in the 1960s - Jim LeBlanc's near-vacuum accident plus animal chamber studies. It's not movie nonsense. It's physics.
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@matoo_0 I love this bit near the start, where Grace is looking at the golden plaques showing how humans evolved, and he copies their posture. Crawling ape. Hunched homo erectus. Upright homo sapiens. And then above it- their future, the culmination of all human hopes- *Grace, now alone.*


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@noinconsistency they're already the most successful parasites on the planet and some people think they deserve MORE?
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@FuguesHumbleSit I love ginkgo bc it's older than dinosaurs and the CONCEPT of deciduous leaves. it really is just fucking eternal and I think it's great that it often symbolizes Abundance in star rail
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@why_meghan @bakujok3s fr my grandpa and his fellow lefty classmates were beaten with rulers when they tried writing lefthanded. unthinkable nowadays
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@Astro_ChrisW Always these obscure explanations and half baked picures of 1/6th of the earth. Something’s not adding up
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One question I get a lot is can you see the stars differently from up in space. When we orbit on the night side of the planet, we get a view of the stars very much like being in a very dark place on Earth. And because of our orbital inclination, we get to see the stars of both the northern and southern hemisphere. I captured this shot of our galactic plane from one of the windows of the Crew Dragon Freedom that is docked to the zenith docking port.

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@amalgamatomaton accelerationism is the dumbest fucking thing ever because no one who believes in it is prepared to rebuild with their neighbors
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@shitpost_2077 maslow's hierarchy of needs but it's all just a red shirt + white suit jacket
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@highelven the endwalker patches were so strong I've been waiting for them to cook like that again since 2023
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@leafmoding it sucks because both the drums and the lead melody are too catchy to use it as my afk spot and not end up tiring myself out by whistling/singing/beatboxing along
but then the ambient noise is also too jarring to mute just the music
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@archaicf0ssil cysts suck!!! best of luck w/ recovery and hope you're not in too much pain rn
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@BambooFighting also WHY ARE JOB STONES NOT MANDATORY IN DUTY FINDER
do what you want in PF or 8-player premades because you can mess around with friends, but the next time I see a conjurer or lancer in lvl 100 raids I'm going to have a nuclear crashout
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@BambooFighting after YEARS they finally updated it to actually teach some of the right things! and then still didn't make anyone play it.
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@2deadinside ok it's not I just know nothing about breakdancing youtube.com/watch?v=Eycixu…

YouTube
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