Brian Cox visits the world’s biggest vacuum | Human Universe – BBC
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Brian Cox visits the world’s biggest vacuum | Human Universe – BBC

October 9, 2019

This is Nasa’s space power facility near Cleveland, Ohio, and it is the world’s biggest vacuum chamber it’s used to test spacecraft in the conditions of outer space and It does that by pumping out the 30 tons of air in this chamber until they’re about 2 grams left This I’ve got an eccentric construction. Which is part of this history it was built in the 1960s as a nuclear test facility to test nuclear Propulsion systems and That meant that they built it out of our [mininum] to make the radiation easier to deal with aluminium is not the best thing the strongest material to build a vacuum chamber out of so they built out a Concrete skin which is part radiation shielding and part an external pressure vessel so this thing can take The Force that’s present on the outside when it’s pumped out to the conditions of outer space Galileo’s experiment was simple he took a heavy [object] and the light one And drop them at the same time to see which fell fastest Now in this case the feathers fell to the ground at a slower rate [than] the bowling ball because of air resistance So in order to see the true nature of gravity we have to remove the air It takes three hours to pump out the 800 thousand cubic feet of air from the chamber We drop to millet or in the last 30 minutes, but once it’s complete. There’s a near-perfect vacuum inside 6104 Manual 10 percent [orbit] Station One go for [Drive] PCB 30-1 pressure set point at 240 PSI. We are go for drop and nine eight seven six five four cameras on two one release Yeah, look at that. They came down exactly this Exactly, not gonna silent exactly just a feathers. Don’t move nothing look at that. That’s just brilliant Isaac Newton would say that the ball and the feather fall because there’s a force pulling them down gravity What einstein imagined the scene very differently? The happiest thought of his life was this: the reason the bowling ball feather fall together is because they’re not… …falling They’re standing still There is no force acting on them at all He reasoned that if you couldn’t see the back gravity There’d be no way of knowing that the ball and the feathers were being accelerated towards the Earth So he concluded: They weren’t

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  1. تستخف بعقلنا ارتطام الريشه ورده فعل الريشه انها مو ريشه عاديه ارتطامها بذا الشكل وتطايرها يدل انها مصنوعه من معدن
    والمفروض انها ما ترتطم وترتد تفضل لاصقه هههههه

  2. Why in slow motion rather not in normal speed ?
    All want to see the feathers falling in normal speed as fast as the ball.

  3. This vacuum-chamber is three-times the volume of a Saturn-V, and this is the only ever public experiment conducted inside it??? How about a free-standing small rocket test inside this chamber, whereby we would likely observe that the rocket would NOT be able to launch vertically up, as I recently documented in a comment under Youtube::: (Rockets in a Vacuum Chamber – Newton's third law of motion Visualized).
    So, stop fooling people Brian Cox!!!!

  4. Apollo 15 astronaut did this with a falcon feather. And you can create it in your own room,

  5. Yeah they arent movint thats just the earth traveling through space while they are stationary.
    Same as the clouds. They dont move thats just because the earth spins. If you wait 1 day you see the same clouds pass overhead.

  6. ռձรձ lყﻨռց ձъօսէ รօოεէհﻨռց ահყ ռօէ รհօա ձƈէսձl รթεεժ ձռժ էﻨოεรէձოթ

  7. ຟhคt if it'Ş ຖ໐t ງrคงitฯ ຟhคt if it'Ş ค ēlē¢tr໐๓คງຖēti¢ f໐r¢ē Şนpp໐Şē໓lฯ Ştr໐ຖງēr thคຖ ງrคงitฯ thiຖk ค๖໐นt it ໐ຖ¢ē ຟē lēคงē thē i໐ຖiຊē໓ คt๓໐Şphērē ຟē Ş໐๓ēh໐ຟ fl໐คt iຖ Şpค¢ē

  8. A few things..
    This proves air has density.
    This doesn't prove gravity.
    Either way the feather and bowling ball fall. Air was just a medium.
    Doesnt prove gravity 🤔
    It's still just a hypothesis

  9. I dont understand. If the ball, and feathers arent really moving then how are they hitting the floor? Are you saying that the earth is what is moving then?

  10. What would happen if you introduce a balloon full of air in the chamber once the vacuum has extractted the out the chamber? Would the vacuum have any affect on it or does the vacuum affect the balloon because is already in the chamber as the vacuum is extracting all the air out?

  11. Cox's remarks about the equivalence principle in the end are confusing. Of course the ball and feather are not "standing still". They're falling. But according to the equivalence principle this is locally indistinguishable from as if (!) the objects are standing still. The "as if" is crucial here.

    The same goes with other inertial forces. Accelerating observers can describe deflecting objects in their frame with newton's laws AS IF there are forces acting on these objects (which, for inertial observers, would move in a straight line). But really, the force (e.g. an engine) is acting on them, not on the objects.

  12. Since they are already on the facility, why not include more items to the test. Like paper, flower pot, chinawares, balloon ball of yarn.. etc

  13. to: BBC
    Why do you make a spindle that free fall while spinning itself and something only free fall ?? and slowmotion recording

  14. I have to dislike this because they didn't show the drop in full speed. So sick of this pretentious over-the-top and dramatic slow-mo trope in modern documentaries.

  15. Sooooooo they funded this area just to drop items and demonstrate how to reduce oxygen in a secluded space? How much did it cost for this experiment?!?!?!?

  16. 210/5000

    This is a total lie, unfortunately. Nasa is bullshit and the facts are as in this movie:

    Greetings to people who have their own mind and will think logically

  17. yes again we see how warping of real time space could be the gestalt of gravity- but there are several methods; but now the map of earth with a sin and cos wave wakes sense – well its just a hunch…

  18. I hope they used the chamber for some other important experiment other than confirming something we already know. Lot of time and expense for naught return.


  20. Well that thing about einstein is true but you can make things a bit less complicated if you just explain the effect by using equation (v)^2 = (v0)^2 + 2gh. No need for complication

  21. Having watched this a number of times, lt leaves me puzzled to why they need to build a structure like this ,when they could have saved the expense and made the same sized dome out of polycarbonate, that's seems to work fine for the Astronauts Helmets . plus I can't understand why they build their rockets with aluminum, Cox clearly states it's not the best material in a vacuum, so many contradictions, is it any reaso people question their bs.

  22. if there is no force acting on them why are they still falling? they should not go in either directions… up down , left right

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