Realistically...

How cold is the surface of Pluto thought to be?
Does it even have an atmosphere?

no atmosphere. you need a molten metal core generating a magnetic field to retain an atmosphere
how hot it is depends what part of its orbit its in since its closer to the sun in some parts than others

Immediately after I posted that, I googled the atmosphere question, and yes it does have one, but it's very thin.
Then I looked up if you'd freeze, and it essentially said yes.
Very yes.
But I'm pretty sure it meant hypothermia, not "get encased in ice" like what happened to Arnold. And it seemed like it was saying that a spacesuit wouldn't be enough to insulate your body, so you'd still start to get really cold just from being there despite the suit and helmet.
So I guess I was right for the wrong reasons.
But just exposure to the vacuum of space, or lack of breathable air, would take a while to kill you.

user, they tell you in the show itself that Arnold would've died instantly had they not been in a cartoon. There's no ambiguity to this situation at all.

Realistically his head wouldn't have frozen into a block of ice in the first place.

Realistically he would have passed out from a lack of air after a few seconds and then died from asphyxiation in a minute or so, faster if he tried to hold his breath.

I think I've heard in the past you've got like 10 seconds of air in your system before you get absolutely fucked in the vacuum of space but that's probably Hollywood bullshit

if you go out of your way to expose yourself like that though then yeah it's game over pretty much instantly

It's not explicitly stated, but this is the final episode and we don't see Arnold again after this scene.

nah they took him home and he had the sniffles afterwards
I distinctly remember the after-the-episode call in with levar burton (was that levar burton? I don't know man it sure sounded like him to my 10 year old ass) where he outright stated that he woulda died in reality though

I had the impression as a kid that he temporarily just went in a frozen coma (between life and death) and Ms.Frizzle used some magic on him to revive him off screen. But yeah that shit was terrifying.

You can survive the vacuum of space for 15 seconds according to studies by NASA

Its warmer than liquid nitrogen, so at the least you wouldn't be flash frozen.

youtube.com/watch?v=KO8L9tKR4CY
Short term exposure to a vacuum isn't lethal, but it ain't pleasant.

lol
just exhale before going out in space and you can survive for 10 seconds trust me

No that's pretty accurate. With zero oxygen you have about 15 seconds before you pass out. about another minute or two before you'd have brain damage and not terribly long after that you'd be dead. All of that is assuming you're not doing something stupid like attempting to hold your breath before you're in the vacuum.

The extremely low pressure actually causes the nitrogen in your blood to start boiling almost immediately once pressurization is lost, even with the token atmosphere of Pluto. Contrary to popular belief, this does not involve the water of your blood, at least not in the short-term. The nitrogen expansion does, however, cause your body to bloat to nearly twice its size within seconds. This occurs simultaneously with flash freezing on the surface of your body. Not enough to permeate anything more than your skin in the short-term, because heat transfer is shit-tier in space, but enough where you would absolutely feel it. So it would simultaneously feel like your exterior is being frozen solid while your body is literally boiling from the inside-out and you're very painfully inflating like a balloon. Emphasis on the painful here Dobson, your soft tissues expanding to twice their size within seconds is absolutely unnatural and results in a significant about of tearing and stretching.

That being said, you're not actually at risk of dying yet. You have about 15 seconds before the oxygen diffusing out of your lungs causes you to pass out. As such a low pressure, it doesn't matter if you're holding your breath, the pressure in your lungs basically gets instantly fucked, and causes oxygen to diffuse out of your blood stream but not back in. Once you lose consciousness though, you're kind of fucked. The vacuum of space will suck the air out of your lungs at an extremely rapid pace once you're unconscious, exposing your aveoli to that same freezing effect that happens on the surface of your skin. So basically your lungs get frozen almost immediately and even if they get you to safety after that, and your aveoli shatter, leaving you incapable of actually breathing. You basically have about 25-30 seconds to get into a pressurized environment again, or you're gone.

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what happen next?
how the episode end?

>Emphasis on the painful here Dobson

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youtube.com/watch?v=BMhf6paKMDA

yeah the whole "vacuum of space" is scary and all, but you can't even survive our own damn atmosphere without proper pressure / oxygen levels.

You're a bit off base. It takes a long, long time to freeze in a vacuum. The blood and water boiling part you're spot on, as well as the time to unconsciousness.

However, vacuum is an excellent insulator, and a human body stores a lot of heat. Thanks to the effects of vacuum, it would take much longer for you to suffer the effects of frostbite on Pluto than it would for you to experience the same problems in Antarctica. I'm talking about a difference of hours.

Since your lungs are deeper within your body than your skin, it would take that much longer for your tissues there to cool to the freezing point. Naturally, you'll have been long dead by that point but that's due to asphyxiation, not any sort of freezing effect.

>That one episode where they become fish and you have them get soaked in fish cum to rebirth

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To clarify, I mean 25-30 seconds AFTER you pass out. Your alveoli aren't so thin that they'd shatter immediately, but they will get there pretty shortly. Also realized that I misspelled alveoli. Studies suggest that under optimal conditions that you could last a bit longer than a minute, but the surface of Pluto is actually sub-optimal. It has an incredibly thin atmosphere, but that would actually contribute to faster heat transfer, however minut, effectively giving you less time.

Pluto's atmosphere is near a vacuum. Arnold would more likely die of asphyxiating than he would freezing as their would be no where for his heat to convect so it'd take hours for him to freeze.

they rush him to the bus, Arnold gets a cold from it.

Huh, really? That honestly sounds accurate but I recall reading that it was your lungs shattering that was basically the true death blow. Might be mixing it up with something else, to be fair.

Nah, death comes from your brain being deprived of oxygen for several minutes. Other than massive traumatic injuries, it's the fastest and surest way to kill the human organism.

Also, to get a lung shattering effect, you'd basically have to gargle with liquid nitrogen, but good luck doing that as it would boil in your mouth and throat long before it got to your lungs.

Yeah I just did some quick research and you're right. No idea where I heard the lung shattering thing, might have been some urban legend mixed in with the actual information I posted about nitrogen and tissue expansion, which does seem to still be accurate. Thanks for telling me user, I feel a lot better informed.

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