14

A currently trending question on Skeptics.se references a website that makes the claim that:

In Yuri Gagarin’s historic flight to space, he returned in near critical condition after only one hour and forty-eight minutes in space. Clearly, there was some vital element missing in space that we receive on earth. Yuri had plenty of food, water and oxygen and since the flight was less than 2 hours, he only needed oxygen. The critical missing element appears to be the earth’s magnetic field. Since that first flight, pulsed magnetic devices have been used in every space suit and space station.

(Emphasis mine).

Ignoring the statements on Yuri Gagarin's health and just focusing on the question of "pulsed magnetic devices":

  1. Has there been an instance of a space suit / space station that does not generate a magnetic field?
  2. If this is not the case, and a magnetic field is generated by the suit / station, is this generated by a specific device (that could be called a "pulsed magnetic device") with the intention of correcting some medical condition?
MT0
  • 273
  • 2
  • 4
  • 26
    That story is complete BS, Gagarin was fine and space suits do not have, nor have they ever had any sort of pulsed magnetic device. – GdD Sep 18 '17 at 09:02
  • I know it, you know it ... is there an example which will show that it is demonstrably untrue? – MT0 Sep 18 '17 at 09:06
  • 17
    There's no list of what spacesuits don't have that I know of, it would be a long list. – GdD Sep 18 '17 at 09:12
  • 5
    +1 It's not a profound question, but it's always good to see someone ask a nice clear question, looking for factual information in a way that can be (and has been) answered with a definitive yes/no. – uhoh Sep 18 '17 at 11:25
  • I'm not sure why you're asking the question in the way that supposes the claim is true. (The quote says there is a "pulsed magnetic device" and you're asking if there's ever been a suit without one.) – David Richerby Sep 18 '17 at 12:07
  • @DavidRicherby Proof by counter example - it is difficult to prove a negative across an entire set of items; however it is much easier to give a detailed breakdown of what components make up one specific space suit and show that a "pulsed magnetic device" is not included in that suit and demonstrate the statement is false by counter-example. If you wish to list all the space suits and demonstrate that it is untrue for all of them then I would accept that answer but it is sufficient to demonstrate it for just one. – MT0 Sep 18 '17 at 12:16
  • 10
    @MT0 Fair point, but if you asked "Is it true that all space suits have one of these things?" then people would naturally reach for disproof by counterexample. It just looks weird that your question reads like it's endorsing the quote in the style of "Prove me wrong or I must be right." – David Richerby Sep 18 '17 at 12:25
  • 8
    What really makes me scratch my head is why PULSED?? All that bunk about necessity for a magnetic field, about lack of magnetic field in LEO, about simulating it, about Gagarin's critical condition, okay, some might be misguided beliefs, distorted hearsay, logical conclusions drawn from false premises, but Earth magnetic field, outside geological timescales, is completely permanent so what possessed whoever invented this to think up a pulsed device? Stowing a fridge magnet in a waist pocket would have provided more than enough magnetic field strength to simulate Earth's magnetic field. – SF. Sep 18 '17 at 12:38
  • 1
    @DavidRicherby Not as I read it or intended it to be read. – MT0 Sep 18 '17 at 12:46
  • 2
    @SF - not to mention - in LEO I suspect that the earth still exerts a strong magnetic effect on the craft and occupants. The quote is from someone who's running a "magical magnet" scam - claiming that "pulsed magnetic" widgety-wonks cure arthritis. Lemme tell you - as someone with arthritis, who can just about barely walk, I would love to find a way to relieve the pain, get back my life, & etc. But miracle magnets - nope, ain't buying that one without a whole lot of peer-reviewed studies, etc. – Bob Jarvis - Слава Україні Sep 18 '17 at 17:11
  • 2
    This is clearly and obviously a dupe of the skeptics.SE question. Changing the question from "is it true..." to "is it not false..." does not make something not a dupe. – Shane Sep 18 '17 at 19:08
  • As far as I can tell, the SK-1 space suit contained a microphone and speaker, both of which are "pulsed magnetic devices". So he did have some of these mysterious life-saving devices. – TemporalWolf Sep 18 '17 at 20:27
  • @Shane This question is asking specifically about the nature of equipment used in space exploration, not about whether the quote has any credibility for its claim. – jpmc26 Sep 18 '17 at 22:47
  • @GdD: So comms-devices aren't electric pulsed? – Zaibis Sep 19 '17 at 12:31
  • Sure digital comms may be pulsed, @Zaibis, however these do not somehow reproduce Earth's magnetic field for medical purposes. – GdD Sep 19 '17 at 12:33
  • @GdD: Just was commenting on "space suits do not have, nor have they ever had any sort of pulsed magnetic device." ;P – Zaibis Sep 19 '17 at 12:36
  • A radio is not a pulsed magnetic device @Zaibis, it may produce a magnetic field but that's secondary to its purpose. – GdD Sep 19 '17 at 12:38
  • @jpmc26 The claims 'specifically about the nature of equipment used in space exploration' were covered in the other question. There is nothing in this question that isn't 100% covered in the other one. – Shane Sep 19 '17 at 15:03
  • @SF, now I really want to see a reference to superstitiously stowing a fridge magnet in a waist pocket show up on WorldBuilding.SE – ShadSterling Sep 19 '17 at 18:12
  • @GdD "A radio is not a pulsed magnetic device" Yes it is. To create a changing E field you must have a B field, and radios don't operate at DC. – Sam Sep 19 '17 at 20:21

2 Answers2

49

Spacecraft and space suits do NOT generate a magnetic field for medical reasons. Any magnetic fields generated are side effects of using electric motors etc.

The linked question on Skeptics thoroughly debunks the idea, noting that:

  1. Gagarin was not in "critical condition" after his flight; and,
  2. Any flights in LEO are well within Earth's magnetic field.

This question has a schematic of the Apollo life support system. The schematic does not contain a pulsed magnetic device.

Hobbes
  • 127,529
  • 4
  • 396
  • 565
  • 11
    The schematic does not contain a pulsed magnetic device. "What are they hiding from us!!" - what a paranoid conspiracy theorist reacts with. – corsiKa Sep 18 '17 at 18:50
  • I may be paranoid, but that does not mean that they are not out to get me! @corsiKa – AnoE Sep 19 '17 at 21:40
  • There are ideas about things like this to abbreate solar radiation using magnetotails. Nothing implemented though. https://www.hou.usra.edu/meetings/V2050/pdf/8250.pdf – Magic Octopus Urn Aug 18 '18 at 04:47
22

Well, an electric motor is arguably a 'pulsed magnetic device', as is a solenoid valve, but good ones try very hard to contain the fields to where they will do useful work.

I suppose one could design a suit without any motors, and it may even have been done, but pumps, blowers and valves and such seem a sort of natural feature of a space craft life support package.

In this sense, yes space vehicles do contain such things, and they ARE necessary for the crews continued well being. If you turn off the electrical power to the life support system and the crew will tend to end up in critical condition fairly quickly!

You can almost always come up with sciency sounding names for mundane technology, "Pulsed magnetic device" = electrical machine of almost any type, and yes you need motors and solenoid control valves to keep the crew alive....

Dan Mills
  • 401
  • 2
  • 3
  • 5
    I would add "But not for the magnetic fields" to the end, and possibly, "Yuri Gagarin's suit did contain these devices", just to round it off. – Kevin Fee Sep 18 '17 at 16:40
  • 4
    I am not actually sure that his SUIT did contain much in this way, the capsule certainly did, but the suit itself? I would try very hard to make that part as passive as possible on an early mission like that. Note that this was not a modern EVA suitable suit with life support pack and all the rest, this was a flight suit of I suspect a fairly primitive sort. But yea, if it had much of that stuff it was NOT for the magnetism. – Dan Mills Sep 18 '17 at 17:14
  • 1
    Giving it some more thought, I THINK that a space suit using no electrics is in fact barely possible, Gas management in the style of a SCUBA Rebreather (Counter lung, CO2 scrubber and a couple of one way valves), the crews lungs provide the power for gas circulation, and as pressures are so low a simple mechanical pressure regulator to make up the loop to a few PSI above local ambient with O2 should do it as long as the crew have no excess N2 to exhale? Thermal control loop, pumped by perilistatic pumping as the crew moves, water ice sublimator to provide the cooling. Comms are a problem. – Dan Mills Sep 18 '17 at 19:39
  • 2
    Looking into it a bit, yeah, the suit doesn't seem to have any life support, it looks like it was meant to be hooked into the space ship's life support system with the hose the whole time. He didn't do a space walk, he stayed in the ship while in space, so he didn't need a self-contained suit. Point is, even he was surrounded by "pulsed magnetic devices". – Kevin Fee Sep 18 '17 at 20:16
  • 3
    +1 for ignoring the nonsense and answering the question. I think any answer that doesn't discuss what a "pulsed magnetic device" might be is sorely lacking. – jpmc26 Sep 18 '17 at 22:45
  • 1
    Do not forget the usually-deadly in Earth conditions dihydrogen monoxide, which in space, as it turns out, is absolutely necessary for survival. – Agent_L Sep 19 '17 at 09:50
  • 1
    Ah, but we have hydrogen hydride available for the sublimation cooling system anyway, so why not use that as a substitute? If you were really going for it for some reason you probably could build a life support package the used no electricity, but why would you? – Dan Mills Sep 19 '17 at 10:03