Spacex Polaris Dawn: Risk Taker or Reckless?

[@tony0x48]

Your enthusiasm when describing the stages by which someone would die if their space suit ripped scares me considerably, Dr Maggie!

[@John-wd5cb]

Carebear! Space is not for the weak.

[@andrewforsythe7240]

Gemini IV did space walk in 1965, no airlock. Nothing new here. The Dragon crew did not spacewalk, only held ladder and looked from the porch. All been done 60 years ago, now learning to do it again. Wow !

[@Merigold83]

The goal of “exiting” the dragon capsule was to test the mobility of the new suits in the real vacuum of space and in a low gravity environment.

[@poneill65]

Nitpick: You can't say this spacewalk was unlike any other because there was no airlock. ALL of the early spacewalks, in fact probably all outside of shutttle and space stsations based ones, were without an airlock. The USSR and USA performed these from Voshkod, Gemini, Soyuz and Apollo capsules

[@cbrock66]

Great video. Something a lot of people miss or just don’t know, these are the first working eva suit designs to be tested in 40 years. If all of the remaining eva suits on the ISS fail and they no longer have spare parts to send up, NASA will be without an eva suit. Of the three other companies that were working on new suits for NASA under government contract, only two remain and none have been tested in space yet. The SpaceX suits are also designed to be built assembly line style so that they can be produced at a high volume for a lower cost. Their EVA might not have looked like anything new but it was a huge step forward that we haven’t seen for decades.

[@John-wd5cb]

Black projects probably full of EVA suit technology.

[@onewhostudies6856]

Not as risky as a flight in a boeing starliner...

[@kennethc2466]

That landed safely? Seem you're demonstrably wrong, as the dosimeter proves.

[@Bitchslapper316]

@@kennethc2466 It was literally deemed unsafe to travel in by NASA which is why it landed empty.

[@jeffrey5961]

SpaceX needs to send Dr Lieu on a dangerous mission. She would be upbeat and informative the whole time.

[@SpaceMog]

@@jeffrey5961 ill go :)

[@samhale5413]

This mission is so much more important than folks realize. Toys for the rich today are tools for the ret of us tomorrow.

[@Broken_robot1986]

Elysium here we come! I didn't see what utility we get from sending humans beyond LEO. There is no reason except to waste money and resources. Robots can do it all for cheaper.

[@MyKharli]

God help us all .

[@LouiseBrooksBob]

Turning space exploration into extreme sports for billionaires is not "for all mankind" is it?

[@John-wd5cb]

Thank God for Communism! Red Space Army is the Strongest!

[@SpaceMog]

@@samhale5413 so true

[@annexcelestial]

This was very interesting!!! Thank you for sharing Dr Maggie!!!

[@SpaceMog]

@@annexcelestial thanks for watching

[@annexcelestial]

@@SpaceMog it is my pleasure

[@andreblanchard8315]

A space walk without an airlock is not really new. Unless i missed it, you did not mention Gemini 4 June 1965 a few months after i was born. Cosmonauts first walk was march 1965.

[@davevann9795]

She is too young to have lived through those early space walks. Later space walks from the ISS and space shuttle, had airlocks.

[@stevenyee8967]

I bet Space Mog would jump at the chance of going to space and a space walk. 🤩

[@SpaceMog]

@@stevenyee8967 yes please!

[@dropshot1967]

1 inaccuracy in this video. The Falcon 9 rocket saw an explosion of the booster as it landed, returning from delivering the upper stage to the correct orbit for a successful launch of the Starlink satellites. The way you worded it in your video it sounds like either the entire launch failed/exploded or the explosion caused the launch of the satellites to fail. These small details do matter when you try and keep an image for accurate news reporting.

[@ptonpc]

Definitely.

[@Otreborthe1]

Yeah. Agreed. I almost stopped the video there immediately. This is a basic thoroughly known and discussed fact that you can’t get wrong or she risks her reputation.

[@schrodingerscat1863]

@@Otreborthe1 She kind of exposed herself as someone reading a script with no real knowledge of what she is presenting, kind of mainstream media style.

[@davevann9795]

That landing was a problem because of a landing leg failure or landing too hard for a leg to handle, so that the bell nozzles hit the deck,.

[@thecaptainsarse]

A lot of space media types and space exploration fans have an animus for Elon Musk. Perhaps of his money. Perhaps because of his success. Perhaps because of his current political affiliation. The last option is sadly the most likely. A shame some people will hate on someone who is doing EVERYTHING he does for HUMANITY. That means ALL humanity. Not just the one who vote the same or different than you.

[@gedreillyhomestead6926]

If we didn't have people who take risks we'd still be living in caves.

[@John-wd5cb]

That's why we love Putin.

[@ninjalanternshark1508]

This channel deserves more subs

[@Navya420]

Agreed

[@HarryNicNicholas]

folks are going to be spending a lot of time in suits if we continue exploration in the current direction, so these suits seem to be a pretty important development. and another important milestone in space exploration passed, commercial travel.

[@ChrisMisMYhandle]

I have massive respect for Jared doing this. He has a relentless work ethic and he has the experience of a test pilot. He really knows his stuff. The fact that he's willing to pay for research missions like this and carry them out is only a positive for space flight.

[@SpaceMog]

@@ChrisMisMYhandle same - what a hero

[@stevenscharmer1765]

Thanks for the video Dr. Lieu. Two things to add: they were at the highest altitude ever maintained in an orbit. So, they were subjected to more radiation than the Apollo astronauts who simply zipped through the Van Allen belts. The mission also ran some important tests on laser optic communication. If this can start to be used, we can lessen the burden on the Deep Space Network.

[@davevann9795]

Deep space laser communication with lasers had previously been tested. The purpose was not to reduce the load on the Deep Space Network, but to increase bandwidth of deep space communication. The deep space network has only been used for human carrying spacecraft when Apollo capsules were far enough from the earth. Polaris Dawn's laser communication tests were to reduce the load on the TDRSS (Tracking and Data Relay Satellite System) satellites in geostationary orbits. TDRSS has been used for relaying communications from the space shuttle, ISS, LANDSAT, and many other earth orbital satellites. TDRSS has bandwidth limitations, and time delays from being at geostationary distances.

[@Petertronic]

It was an exciting mission, enjoyed hearing your take on it

[@hankseda]

If had billions of dollars sitting in my bank account then I'd not hesitate to go to the orbit, or Moon or Mars if opportunity came up. Maybe the wonderful enthusiasm of our beautiful Dr Maggie is infectious 😊

[@MyKharli]

Haha , you swallowed the hopeum . Awaits to see how anyone's enthusiasm would last . What's missing from all these fantastic space ventures is living in a nappy , 100 s single point lethal potential events and who likes living in a tiny room with the same people for more than a day ..oh , no one . Unless your just show boating your billions , that i can understand and wish we taxed the rich more ..looks at the state of essential services .

[@samedwards6683]

Thanks so much for yet another highly energetic explanation of what is going on in space and the stars, Dr. Lieu. I always look forward to your videos.

[@onewhostudies6856]

yeah uh, after the 23rd launch and landing, one of the falcon 9 rockets legs broke when it landed, so it fell over and blew up.

[@paulalexandredumasseauvan2357]

one news report stated sarah gillis started at spacex AS AN INTERN! 🤯 thank you for a great report dr maggie! 👍☺

[@rolfw2336]

She was incredible. And she topped it off with a violin performance!

[@EscapeRealityMedia]

great vid as always

[@alicelund147]

Very graphic description of the effects of a broken space suit!

[@Allan_aka_RocKITEman]

Great video, Dr. Maggs...👍

[@theemissary1313]

Hm. Learned a lot about this, I didn't know they went to the Van Allen belt. The spaceX suits do look like props from a tv show in all honesty, but also on the footage of the actual space walk, they looked like they had similar issues as the mercury missions in that the suit went quite rigid with stiff, jerky motions. At one point it looked like the astronaut couldn't get a good grasp on the outside handle. Regarding catastrophic decompression though, in 1965 Astronaut Jim Le Blanc experienced this in NASA's vacuum chamber during training. He made a full recovery, but in one account he simply blacked out and only suffered explosive vomiting and, um, the other end, as gases instantly expanded before regaining consciousness a few minutes later. So in theory, if an astronaut is returned inside a vessel's atmosphere soon enough they will survive almost fine. Another one the expanse got right. Great vid :3

[@DesertRat332]

Love your videos, Dr. Lieu! I especially enjoyed the one on Orbital trajectories to Mars. You did such a good job explaining the math, that even a dumb, old, retired engineer like myself could understand it! (lol) 😄 Please, continue! (P.S. I like the little space kitty, too.)

[@corychristensen5917]

"Back home we've got a lot to fix, but sure looks like a perfect world from here" what a cool thing to say

[@ArchDudeify]

Another great posting 😎 I was wondering what they were up to

[@zohraharzi]

Hi Darling Thinking of you ❤❤❤

[@ARWest-bp4yb]

Titan was a disaster just waiting to happen so I wouldn't compare the two given SpaceX's track record, but I'm glad they're back safely so you can relax!😅😊

[@joelcorley3478]

We've seen this type of space walk before. Gemini and Apollo programs both did EVAs and neither capsules had air locks. In fact the Space Shuttle has been the only manned vehicle to include an airlock in the history of space flight. Even the Apollo LEM required the astronauts to depressurize the vehicle for either to exit.

[@maramé.r]

Overall, there seems to be little point in this endeavour apart from thrill seeking. Hardly ‘space’ travel being only a short distance from the Earth’s surface. Vast amounts of money spent and the burning of carbon compounds releasing greenhouse gases and pollutants. All while the Earth burns, floods, biodiversity and ecosystems collapse. There really is very little need for humans to go into space. Well never reach any stars and colonising the solar system is really not a priority

[@jeffcrites8184]

If they went so high and did an EVA, they should have fixed Hubble. That would be $100,000,000 well spent!🔭

[@stevenscharmer1765]

Isaacman actually proposed to NASA that he and the crew on the next Polaris mission could repair Hubble at no charge. NASA said no, they were worried a potential repair could go awry and make matters worse.

[@inmate1614]

So fucking cool and the suits are so much better than the rigid suits used previously. Were they attached with umbilicals or were they just tethered btw?

[@stevenscharmer1765]

Umbilicals, with full life support coming through.

[@inmate1614]

@@stevenscharmer1765 Thanks

[@misutsuki]

Thanks for the video~ Such an exciting topic. Btw: What is the name of the song playing in the endcard?

[@LeviticusStroud]

Slight correction. The vacuum of space isn't 'cold' per se, it's a vacuum and thus holds no thermal transference capability by conduction nor convection. Hence why we have clouds of 'hot hydrogen' which are too dispersed to cool down and have no ability to transfer energy to other material (and also reach a point where they can't even radiate heat as they don't have enough energy individually to drop a quantum state by emitting an electron). It's the outrush of air from high to lower pressure which which draws heat out from its surrounding environment as it loses its own, due to depressurisation, which is actually 'cold'- similar to when you spray out all the contents of a pressurised can of paint or deodorant in a short period of time and said can starts to freeze. ie Boyle's Law.

[@Naomi_Boyd]

Are you sure about that "hypothermia in minutes" thing? What's the thermal conductivity of a vacuum?

[@ajaykarratha]

Can you please make avideo on uphoff-crouch cycler orbit

[@AndersWelander]

Do they have nitrogen in ISS but just pure oxygen in spacesuits? I wonder how bad it would be to step out in the Van Allen belt.

[@philochristos]

I would do it. I mean it's risky and all, but it's also very awesome. I'd do it just for the novelty of it.

[@NachtmahrNebenan]

Thank you for calling them names. Really, they are!

[@johnlewis8664]

Very interesting stuff! Looks like it’s a rich man’s game still. It doesn’t look like I’ll be popping up there any time soon

[@TheErichill]

EVAs during Gemini and Apollo all involved decompression of the vehicle.

[@esslar1]

Well, that was quite graphically gory! A bit of a shock after other videos with a lot of equations and diagrams in them. Yes, why do these rich people have a death wish? It's beyond me.

[@fleef3790]

Was Dr Maggie Lieu singing at the end? I am sure it was her voice :)

[@ChrisM-hx9kv]

Commenting to feed the algorithm 🙃

[@EscapeRealityMedia]

honestly it looks like the astronauts are wearing motorcycle gear but if it works in space thats awesome

[@807800]

1:20 "whilst deploying Starlink" That's wrong though. It failed the landing, after successfully deploying the second stage that carried the satellites, the mission itself is a success.

[@SpaceMog]

@@807800 spaceflightnow.com/2024/07/11/live-coverage-spacex-to-launch-20-starlink-satellites-on-falcon-9-rocket-from-vandenberg-space-force-base/

[@christopherwilson6527]

Its ok it wasnt a space walk. If you dont fully leave, it doesnt count. One cant walk without legs, and they were inside the capsule

[@onewhostudies6856]

Would you have gone if they offered you a seat?

[@Navya420]

Nice tunes btw

[@JohnnyWednesday]

There were literally no precautions taken to dissuade a Romulan attack during the mission. They'll pounce next time!

[@williamthomas5788]

The did a long pre-breathe (over a day), clearing nitrogen, before they evacuated the capsule.

[@WatchingUntiltheEnd]

4:02 to 4:40. Doesn't sound too bad.

[@andreblanchard8315]

There is a NASA video of a suit test in a vacuum chamber when a seam ripped or something let go, they were really pushing the timeline at that point, he survived but it did not look like fun.

[@geesehoward700]

the oceangate sub was guaranteed to fail at some point whereas polaris dawn was "just" incredibly risky stunt.

[@BZAKether]

I have my reserves about billionaires funding space missions, as they could at any moment classify their scientific findings as private and set to benefit only themselves, which in the long run could make scientific advancement harder. About why they do it, I think they have good reasons and even intentions, but I have the feeling that it can be reduced to just a very expensive and risky tourism experience.

[@ryan266846]

5:23 imagine being so sick you throw up through your visor... The mind bottles.

[@648Roland]

Not going.

[@techlifebio]

It's a bit hyperbolic to compare this to billionaires going deep into the ocean in a mostly untested submersible with zero control redundancy. This was a a well planned, tested and trained mission that represents a huge step back towards further exploration of space beyond leo

[@ollieoniel]

All the stuff you have said about blood boiling and freezing does not happen. People have already had vacuum problems and none of that happened.

[@visionentertainment8006]

Clearly not long enough

[@JBroMCMXCI]

Wow, I didn’t know humans can survive vacuums. You should Tweet at Elon Musk, they’re wasting millions on space suits that astronauts don’t even need!

[@LindaMadlala]

In short, the new spacesuit is a spacecraft or spacecraft cabin on its own. We just don't realize what a gigantic leap this mission accomplished. When u consider that NASA are spending or overspending billions on their Artemis spacesuits and still having insurmountable problems that could collapse their spacesuits project or the Artemis mission.

[@davevann9795]

The SpaceX EVA suits are not yet designed to completely solve the lunar dust problem. Lunar dust causes many problems because it has such small highly-abrasive particles. The Apollo lunar suits all had damage from lunar dust, and would not have survived an extended stay on the moon. The lunar astronauts all had minor lung problems from inhaling the fine dust particles into the lungs. The NASA suits being developed are trying to solve ALL the problems for the first deployment of the suit. SpaceX is doing its usual incremental development, to solve some of the problems, test the results, then iterate to solve more problems.

[@KittyBoom360]

Honestly, it's difficult to care when people were supposedly riding dune buggies on the moon over half a century ago.

[@DavidBrant]

You are Reckless! heh heh heh 😈 those space suits remind me of bee keepers.

[@fry5family]

One aspect of this mission no one has commented on is the potential risk to families. Four happily married astronauts with young families leaving with each other for a 5-day sojourn in a one room cabin. Many of the activities involve both invasive and non-invasive contact with each other. Undressing and dressing, a toilet that swings down into the room from the ceiling. It is Big Brother on steroids. Are their spouses simply expected to pretend to be alright with this like their significant others are "soldiers in a foxhole"? How do the four condition themselves over their two year training stint to live with each other 24-7 in a zero privacy environment? And how are their spouses dealing with it?

[@alexanderpoplawski577]

Seeing other crew members naked was the least concern of the spouses.

[@MicrobiusBlue]

Great coverage thanks Mog 😎

[@husk79]

astronaut suits have come a long way... those look much more comfortable than those huge puffy suits..

[@kylereese4822]

NASA space suits are a roughly 60 year old design, the ones on ISS are about 30 years old..... think I'll go with SpaceX versions....

[@noam65]

Both US and former USSR did this. Why is it a thing, if SL the spacesuits were working properly?

[@mouseripper4257]

I dunno that your blood would boil... The vapour pressure of water at typical human body temperature is around 0.06 atmospheres or 70torr, and as most people don't leak blood all over the place with a systolic pressure of 130torr, i.e. your blood vessels should retain enough pressure that your blood won't boil. I do not doubt however that the experience would be (briefly) most unpleasant! Also, I suspect you would not become hypothermic and "die within minutes", as there are very few molecules available in a vacuum to whisk away your body heat (this is why a vacuum flask works). In any event you would have issues with asphyxia long before you started to feel chilly. Anyone want to do the maths on these icky issues?

[@Merigold83]

Did you just compare the Dragon Capsule with a submarine, whose owner and inventor fired everyone, who brought up safety concerns?

[@FrankReddick]

Yup. Yup. Yup.

[@timcro1966]

Weirdly, I would rather risk going to space than deep ocean.

[@Navya420]

Imagine eyeballs exploding due to pressure differences, eek

[@MadMichigander1313]

They didn't have 'airlocks' on either Gemini or Apollo...Sheesh!!!

[@iluvyunie]

I like what space x are doing, but I don't think the goal should be to make space profitable as fast as possible.

[@davevann9795]

SpaceX's goal is to make space "affordable", not necessarily "profitable".

[@IanM-id8or]

As low as my general opinion of anything Elon Musk-related, I believe this mission has decent tech - unlike the Titan - and the mission is as safe as a spacewalk could be. I daresay that Jared Isaacman is far, far safer than he would be were he riding a bicycle in the vicinity of of a Tesla in self-driving mode ;-)

[@ChrisNZ2]

You should really do some research, or at least read the description of the mission before you post. As others have said this has been done before, The Gemini 4 mission which was the first American spacewalk also depressurized the whole craft. As others have said the Falcon 9 failure you say caused a mission failure was actually on landing, the mission was successful, only the booster lost on landing. Everyone else loses every booster they launch... only the Falcon 9 boosters land and are re-used

[@mmmmmmm8706]

Yeah, ill stay on earth too, yes. Earth good.

[@Zoot-HornRollo]

Fire musk into space with limited Co2.

[@YousufAhmad0]

Did you just call them "these suckers" 😂🤣

[@nikjs]

lets put soros, gates, zuckerberg and bezos in the next boeing tourist spacewalk mission.

[@fredsaenger6476]

Hey, it's their decision to take the risk, so it's none of your concern.

[@ptonpc]

Billionaires playing. Hopefully SpaceX and the engineers got some good data. Gemini did this for example.

[@endofunk2174]

SpaceX could perform these tests on earth in a vacuum chamber

[@petertorvik8413]

obviously they tested it in a vacuum chamber on earth first

[@endofunk2174]

@@petertorvik8413 That's what I implied -- she claimed it wasn't tested.

[@petertorvik8413]

@@endofunk2174 right you are, they could and they did

[@endofunk2174]

@@petertorvik8413 Exactly

[@thedogfather5445]

Whilst I usually love your content, I found this to be unnecessarily alarmist. You say that the spacesuit had never been tested in space before - well, no spacesuit has been tested until the first time, and they have been extensively tested in a higher vacuum than that found at this altitude. You say the spacesuits are made of fabric - all spacesuits are made of fabric, ever since Apollo. If you are going to test risky systems in space, who better to do it than billionaire playboys. No need to risk highly trained astronauts. You also cite the recent failure of a SpaceX booster on landing. This is largely irrelevant as there is currently no plan to return humans to the surface by propulsive landing.

[@flakcannon722]

Why do billionaires do dangerous cools things the rest of us don't? Because the rest of us can't afford it. Simple.

[@MyKharli]

Very little talk about the damage to upper atmosphere from reentry burn ups , and why no news on the rapidly worsening ozone hole ? If you look it up you would think it a fantastic human success story but then you look at last three years records...what's going on ?

[@arnokosterman231]

To bad in here hornest reactions are erased too

[@arnokosterman231]

Thank you and oll oll injoy being🌈🍀🌳🌻🌱🌻🌳🍀🌈

[@levelearthobserver8341]

Neither, just a daft pantomime for the naive.

[@FIVE-0-APOCALYPTO]

Dr Ghetto white corn chip nails.... Doctor..... lmfao

[@davevann9795]

Way too alarmist and negative of a video. More research would have quieted some of those alarmist comments, such as spacesuits being made of fabric, since ALL spacesuits are made of fabric. And too much negativity about rich people and taking risks. Driving race cars, skydiving, skiing, and driving the family car, are all risky things that people do. Way too much emphasis on decompression issues. The suits were all tested in vacuum chambers, so the only new condition for the suits is weightlessness. There were no rapid decompressions planned. After years of deep sea diving and of humans in space, decompression issues are well understood, and are regularly handled without problems. Accidents can happen though, and every astronaut in space, and every person on high altitude airliners, and every deep sea diver, is at risk of decompression accidents. People will not quickly freeze in a rapid decompression accident In the vacuum of space, because although the decompressing air will get colder due to the Ideal Gas Law (pV=nRT), but the thinning air will be less able to transfer heat. And when a vacuum is reached, there will be no conduction or convection to carry away bodily heat. Not having an airlock is not a big issue, since only space stations and the space shuttle had airlocks. All other spacewalks were decompressing the entire vehicle, relying on every occupant's space suit to protect them. The Apollo astronauts did at least 3 spacewalks in deep space (not on the lunar surface but beyond earth orbit), depressurising the entire capsule. If the alarmist hype in this video is to sound scary because of Halloween approaching, i can understand. Otherwise, more research would be helpful, to go with the technical scientific fact-based nature of this channel. The negative attitude about rich people, and about people taking risks, just doesn't seem to fit this channel, and only attracts people who already have negative attitudes toward the world.

[@FIVE-0-APOCALYPTO]

How about a little more research into those ghetto corn chip style fingernails... Hey, one day I guess anyone can be a doctor of science eh? (shrug) who knows.... right. WHO THE F*** KNOWS😡 ..... you're wasting your breath 🤡 just to sound smart or important..... Do you know what Adolf Hitler said? "Show me one example in history where DEMOCRACY has ever built domed monuments, a legendary military and or countries..." Prescott Prichard of the national geographic society in the early 1900s, wrote a book on his observations of ....HAITI. There he noted, any Haitian of seemable importance, bore the name of.... GENERAL. One night he had dinner with 3 Haitian generals, which came to find, HAITI boasted approximately 7000 generals. Quote, "At one level the black generals converse with some semblance of military matters, but on another level, completely out of touch with reality.....one is reminded of the classical African stereotype, wearing an opera hat and a loin cloth". End of quote.

[@NobodyOfNote-qv5wh]

No, you are wrong. This is just another billionaire with an oversized ego. Boring.

[@JohnnyFaber]

Ummm fact check:Cheech and Chong got MUCH higher.

[@GeraldBlack1]

Money can't buy common sense.

[@g.s.6255]

You are very pretty 😍❤😘

[@mostlyindica]

There's a reason we have Airlocks... Felon Musk needs to answer why his spacecraft think its not required......

[@kylereese4822]

Apollo, Gemini never had airlocks...

[@skymooov132]

You are the third woman I have seen today with white nails.

[@cjsteadman6217]

No American space craft had an airlock until the Shuttles. There were plenty of space walks during Gemini and Apollo, so why the angst?

[@kylereese4822]

Because Astrophysicist are salty about Starlink blocking there view... they want to stay on the ground and never venture out of labs and just spend 10, 20, 30 years on million $ probes that may or may never work.... basically stalling human progress....