Planetary Poles and Magnetic Fields - Sixty Symbols
Vložit
- čas přidán 12. 05. 2019
- Dr Meghan Gray chats about magnetic fields and the Earth's changeable poles.
More links and info below ↓ ↓ ↓
More Dr Gray videos: bit.ly/Meghan_Playlist
Deep Sky Videos astronomy videos: / deepskyvideos
Dr Gray at the University of Nottingham: www.nottingham.ac.uk/~ppzmeg/
Visit our website at www.sixtysymbols.com/
We're on Facebook at / sixtysymbols
And Twitter at / sixtysymbols
This project features scientists from The University of Nottingham
bit.ly/NottsPhysics
Patreon: / sixtysymbols
Sixty Symbols videos by Brady Haran
www.bradyharanblog.com
Editing and animation by Pete McPartlan
Email list: eepurl.com/YdjL9 - Věda a technologie
What a treat to listen to a very knowledgeable person with excellent communication skills. More of that, mankind.
On a side note, it's reasurring when these very, very smart people stumble over the occasional word. It helps me feel better about my own speech.
Who knew that when combining Navier-Stokes and Maxwell's equations things would get complicated.
Ever since i was a young undergraduate recoil in fear at the words Navier Stokes...
This was much much more interesting than I thought it would be. Very nice video.
All fields of physics work like that
I feel like she's describing the lead up to the end of the world.
@Frank Snapp Amazing
Ok
She's awesome physics chicks are the best
As a Canadian I am not sad about this. We can share the North pole.
And for anyone that is asking; yes, Santa is Canadian. His postal code is H0H 0H0.
Nope, he is fake. The real one is in Finland. He has a postal code there too. I don't remember what it was. But in fact, they are all fake derivatives of Sinterklaas (Dutch) which is a fake derivative of Thor.
@@ronaldderooij1774 rustig aan ronald was grapje
North pole is just going to be open ocean anyway, the south pole is the place to be in the future. Unless we use nuclear power to stop the climate crisis ofcourse.
Sounds legit.
Nonsense, everybody know that Santa is Finish.
Brilliant video! Love Dr Gray's enthusiasm!
ANTON! Hey, Buddy! Love your videos!
I agree Anton.
Also, your videos are fantastic,as well!
Hello wonderful person
Like a true Eagle Falconeer.
Anton... You're rad!!!
[9:08]. "a bit wonky". Dr Gray sounded well English. She's been hanging out with us for so long she's picking up an accent 😂. And we're happy to have her 👍
That sound effect on the google earth zooms is definitely the sound of the Imperial Probe Droid on Hoth from The Empire Strikes Back right?
You've got it backwards. In the movie it wasn't the Imperial Probe it was the "Google Drone" sending the map data. :-D
This video is awesome and is surely the start of a magnetic pole rabbit hole for me. If I'm not back in a week send a search party with a map and a -compass- better map.
an interesting instrument for finding magnetic fields is called a Ferrocell; it is a small amount of magnetic fluid called Ferrofluid developed by NASA sandwiched in between two glass plates with LED lights around the sides. very interesting.
@Frank Snapp
Lol...@MHD.
Evan Fields, even better, send someone with GPS kit.
It's been a week. Are you back?
To look into the rabbit hole with a periscope watch Ben Davidsons earthchanges playlist on his Suspicious Observers CZcams channel
Those magnetic topographic maps were amazing. I had no idea there was that much variation.
It is a pleasure listening to such an knowledgeable person. Dr. Gray makes the subject approachable for all audiences. Thank you for posting it.
Thank you for making these awesome videos!
"It's a very complicated field." Scientist really can't help themselves with the puns.
Blame the linguists... they made the words. We just use them.
@@its1110 Linguistics don't make words. Now that I think about it, scientists make way more words than any other group I can think of. That's not a bad thing. But it is true.
@@josephdestaubin7426
And just imagine what must be the case with __German__ scientists. Given all the compounding. :)
We'll just leave it to the Semanticists to fight over later.
@@its1110 At least they ain't Inuit...
globe earthers aren't scientists
Awesome video! I wish you'd asked why the magnetic and geomagnetic poles are different. That seems surprising and non-obvious.
Yes. I think they glossed over that. Maybe they thought it was too obvious. Had to search for the answer elsewhere. Great video BTW !
Before GPS when ,as an airline pilot, we had to fly over the very north we had to be very wary of losing Inertial Navigation computation of the offset caused by the variable magnetic offset required to stay on course.
Would it be considered "going into the dark"?
Back in 1964 my science teacher told me that magnetic deviation was caused by large loadstone deposits in Canada. I did watch a documentary recently about magnetic pole reversal and they made it out to be quite alarming. Thank you for this fascinating video.
This answers a whole bunch of answers I had about this subject.
Good video!
finally a new sixty symbols video, where have you guys been?
Two words: Hello Internet.
@@patrik5123 Two words: wax cylinders
Everyone on these videos always seems so excited about their individual subjects. That's so inspiring. If i had professors like this when I was in school or college, I might be doing something very different right now, instead of commenting on a youtube video.
I always enjoy the videos with Dr Gray... As a Canadian, I may be biased in this... But one thing I notice every time is just how precise her diction is. I don't know if I've ever heard anyone else speak with such clear articulation.
I notice the British accent creeping in.
Magnetohydrodynamics? Shouldn't there be thermodynamics in there as well? Magnetothermohydrodynamics. But what if you need to simulate a single electron in that mess? Well, that'd have to be quantum magnetothermohydrodynamics.
You are giving me nightmares and Vietnam flashbacks simultaneously.
@@hamstsorkxxor Just be glad you don't have to factor in gravity...
But if this electron is moving near light speed that would be quantum relativistic magnetothermohydrodynamics
@@lijemutu The problem with that is that an electron can't move at relativistic speed through a medium, which is required for all the other bits. Nice try, though.
Fusion research looking at particle scattering in the plasma deals with exactly this scenario. There's also an application for this in the early universe where you get to factor in relativistic effects along domain fronts formed as the universe expands, which might help address why there is so much more matter than antimatter in the universe, depending on what still undiscovered physics you decide to include in your calculations.
I'm pretty sure the fusion people have the more complicated scenario though, because they actually need fine details where the cosmologists and particle physicists can just worry about average everything (probably).
Loved it!!! Thanks for your time and effort!
Brady, can you do follow-up on this where very precise atomic clocks are used to measure minute changes in gravity and thus allowing to "see inside the Earth" and on top of that attempts to use neutrinos to map interior of the Earth. I know neutrino detector and beam is used to screen through Fukushima nuclear rectors to get a picture how the melted core inside looks like. Neutrino thing is very in its infancy but very precise atomic clock approach is long known.
I thought they used muons to image inside Fukushima?
@@lordgarion514 Yes, my bad! It was indeed muon tomography attempt. Now the Q is can it be used for screening thicker objects.
Meghan Gray always has a wonderful way of explaining things!
Hurray for the Schlumbergera. I always get excited to see it in the background.
It's not true *all* speakers have magnets, altho a large majority do. There *are* electrostatic speakers.
Dude, this video is just magnificent! Thank you! I wish to work with you guys one day. I have a colleague that will soon, I'm totally jealous hahaha
Discored so much stuff I didn't know before watching this vidoe, and now I have an interest in this subject, thank you!
It's amazing to hear an astronomer speak so cogently about geology! It's obvious that my field has her enthralled as much as hers has me, and wish I could speak astronomy as well as she speaks geology 😂 Dr. Gray is the best!
I wonder how the sun's field affects the formation of each planet's field.
I have no idea if this is at all related, but the regularity of the pole flip, along with its "wandering" nature sounds like an Intermediate Axis phenomenon... just kinda has that feel to it...
Huh that's a pretty interesting comparison I'd not considered before. I like the way you think!
One of the best Sixy Symbols videos ever.
I love Dr Meghan's videos. Thank you brady for making these awesome videos and thank you Dr Meghan for making them informative and lovely.
"Astronomers don't know a lot about magnetic fields"
And a thousand juggalos liked this video
This was super interesting!
Wow, one of the best videos in recent memory!!
Amazingly informative video. Well done.
...were those the Imperial Probe Droid sound effects? I thought it was just a coincidence with the garbled speech, but the the "wom-wom-wom" sounds kicked in...
I think it was
Dont think so, but they were Very similar. Just dont let Han or Chewy (rip) shoot any of the poles !!... ;-)
..and Saturn.
Interesting stuff. As a radio amateur I notice these effects all the time as the Earth's magnetic fields affect radio propagation. I've not been licenced long so I've yet to see a full solar cycle but sporadic E propagation I find amazing. Usually VHF is line of sight or a little beyond but I've seen it open up to Western Sahara. No one fully understands it but it really is interesting to experience
I just finished watching Anton Petrov's video on the poles flipping, then the one front EON. Yours popped up in my feed. It was a nice companion piece and very well done. Thank you!
Such an interesting video! Thank you!
Do our cell phones do the self correcting when you turn on the compass apps (i.e. the built-in one on the iphone)?
Pretty sure those apps use GPS and the accelerometer inside the phone to simulate a compass and it's not a true compass. So I imagine they show a pretty true north.
Edit: I was wrong. Phones do have magnetometers built in. Should have done a quick Google search first!
@@mastod0n1 no, magnetometer so magnetic north. quite accurate as well.
presumably the hardware in engineered such that there is no internal interference. Plus, as long as the interfering field doesn't move with respect to the sensor, and isn't strong enough to swamp out the sensor, you can compensate for interference
there's a setting for it--you can choose.
Depends on the app; some do the correction, some don't, and some shows both the true and the magnetic north (using your GPS position to figure out the required correction)
"It's a very complicated field." I see what you did there.
Awesome video with extraordinary explanations about North pole(s)... Thank you.
Great presentation!!!
"Where Santa lives"... you forgot to include Superman ;-)
Has anyone ever seen Santa and Superman together? Well!!
"S"! It's the "S", people!
Superman is not real though.
Superman doesn't actually live there. He just has a place to get away-from us when we drive him crazy...
So Mars lost its atmosphere when its lost its magnetic field. What about Venus? We're told it too lacks a magnetic field, but it has an extremely dense atmosphere, despite being subjected to more intense solar wind than Earth or Mars. How come?
Never heard that Venus doesn't have a magnetic field.
Will have to look that up some time.
Will postulate preemptively that Venus' gravity being greater than Mars' helps along with the fact that it's atmosphere is made of denser gases and that active lightning storms on Venus may also help repel solar wind. That's my guess.
Mars has a magnetic field. It's just extremely weak and nowhere near as complex as the Earths or other bodies.
It sounds like Venus doesn't have a magnetic field produced from a geodynamo (like us), but rather a weaker magnetic field resulting from charged particle interactions between its ionosphere and the solar wind. It's apparently strong enough to provide some protection from the solar wind stripping its atmosphere off.
Venus is a captured comet that pulled away Mars atmosphere as it passed...Prof James McCanney has written books on the subject for 40 years but main stream science isnt smart enough to digest the info.
@@numb3r663 velokovsky wrote a book about that 70 years ago worlds in collision
This is an amazing video. Thank you so much!
Amazing videoooo 😍😍😍 keep it up Brady and professors
Thanks for sharing such a detailed video. I don't know why scientists never mention solar activity such as long periods of solar intensity (modern maximum) or the repeating cycle called the grand solar minimum. It's not a coincidence that the poles are moving faster and the previous 4 solar cycles have had less sun spots with a weakening magnetic field. Then there's the south Atlantic anomaly which looks like it's preparing itself to become either a north or south pole. Just wanted to add, imagine if the sun was to hibernate then any notion of a magnetic field on earth is laughable. The driver for the magnetic field must surely be the sun! These satellites are simply measuring the effect that the sun has on our planet.
For years now I've seen stories upon stories about migrating animals flying or moving to the wrong place following their inner compass and then dying in a horrific "mass die off". I think humans are in trouble if we experience an excursion because our bodies rely on the magnetic field too. Life expectancy will go back down to low numbers as we try and adapt to the change in polarity. We're in serious trouble. Thanks 👍
According to the Finnish Tourist Board, Rovaniemi is the Official Hometown of Santa Claus in Lapland.
I am subscriber in this channel with multiple devices. I like all the scientist how they explain.
Great video! I had no idea that magnetic north has been moving!
And when everything else fails, follow the birds.
And the sun the moon And the stars.
Which just leads you to a field full of amorous birds.
so much knowledge, so much passion! Given away so humbly and yet so clear and engaging. You deserve 7 billion views! Now I know a little more about the place where I live, and the place where I am going to die.
Thank you!!!!!
love the scout drone sound effect while zooming in to the poles
Great video !!
Where does the seed magnetic field come from?
It could have come from any source that created even the tiniest of electrical currents or electromagnetic fields; the magnetic field would induce a difference in voltage in the Earth between two points, cause current to flow and a new electromagnetic field generated which would feed more induction, more current paths until you have a self-exciting planetary magnetic field - but that is just my opinion.
@@False798 Sounds interesting!
Lucie Green would be a great scientist to interview if you want to make a video about the sun’s magnetic field.
Amazing video, thanks
In order to design power supplies, I designed magnetics; transformers, inductors, and baluns. I have a number of formulas I use, but I have no way of explaining what is magnetism. I just use the formulas and the parts work.
This was the most fabulous animation of an asteroid hitting the Earth I have ever seen
It's a time of big stress for old-school sailors
Yeah, 'm glad I got of the USCG before the Emergency update of the variation. Changing all the Navigation standards and chart work would be a monstrous feat.
I so admire really smart people!! Brilliant and extremely well spoken.
Great Contribution!!!
Dr. Gray has been in britain too long; listen to those 't's! (Great video, as always.)
So, what I take from this video is that the Earth's magnetic fields are Imperial probe droids.
They're looking for our planetary shield generators.
Electronic Arts Jedi Knights
@@sakadabara Nah. The imperial probe droid in Empire Strikes Back, to be precise.
I’m surprised they didn’t self destruct as soon as they were located
Immensely fascinating video.
3:51
'half of Earth's interior'
Since we are talking about a volume, should the radius corresponding to half of it not be (Earth's radius) * 1/2^(1/3) = 6371km * 1/2^(1/3) = 5055km ?
Wow! A changing magnetic field would certainly affect the global climate!
not necessarily
👍 yes it does and when it reverses, it's game over!
183 documented reversals in the past 83 million years (see comment below) of the magnetic pole flipping. They can see it in rocks from different time periods. This is a scientific fact. It's not a debatable issue like some people seem to think.
Nobody doubts it. But I could be wrong. Many scientific facts are doubted by many idiots/flat eathers/climate change denialers and so on.
Unfortunately the flip occurs every 12000 years so there have been many more reversals than documented.
(More info can be found in a playlist called prove on my channel.)
@j carlton What did you notice specifically?
@j carlton Nothing can take the stars out of the sky. Obviously clouds or dense fog can obscure them.
@j carlton There have been 183 documented reversals in the past 83 million years. There are also thousands of short term and temporary reversals. I witnessed one in the late 80's when a huge CME (Coronal mass ejection) from the sun hit Earth and overwhelmed our magnetic field. I watched (With my own eyes) as my compass pointed SOUTH for 11 minutes. (Instead of North.)
I love these videos so much thank you
Oh my god! Finally a video, you’ve got me waiting wayyyy too long!
Thanks tho!
This is a big deal in aviation as well. But of course deflection makes a bigger difference.Of course hiking you'll be doing well to go 25 miles in a day. Flying you can go 250 miles in just 30 minutes.
maybe the magnet field is induced by the solar electric field.
Never thought electromagnetic fields could be so interesting!
It was a decent explanation. Thank you Sixty symbols 😊!
3:35 We don't know anymore about the earths core than we do about the magnetic field. We ASSUME its solid iron, but when you apply logic, how can the core remain solid when it is surrounded by molten iron?
@SpyingDutchman When you heat iron, it loses its magnetism. Yet we have a magnetic field???
The earths magnetic field might be very complicated, but
have you considered magnetic fields?
Have you considered injuring yourself?
I find them repulsive.
wait, what?!
@@NordboDK I'm personally quite attracted to them.
Once the magnetic reversal is done and the poles are no longer moving, (for a while) do you think that the poles will be renamed or call what's in the North, the South pole?
Amazing video thank you so much. I wonder how much effort it takes to do all those measurements on earth !
I feel slighted. On one hand, this video was 20 minutes, but on the other Meghan's conversational style made it go by too fast.
Love the droid sounds!
The Jedi Academy II game is strong here.
That creeped me out
Bangui anomoly seems quite close to the Oklo natural fission reactor - is there a relationship?
yay. great vid. very informative
I think they underestimate the danger of a pole shift.
27 flat Earthers couldn't handle this.
Thank you for the informations
My physics professor studies the earth's magnetic field. He makes these gigantic models of earth with salt water ice and measures how the core changes and moves over time. I found it very interesting.
8:30 Wakanda!
Damian Reloaded dude your right
I think Wakanda is further east than that
I thought about the same, but you beat me to it
COOL! :) LOVE your channel! :)
U killed it although it is very complicated topic and also power points and images were so helpful
Liked the 'Hoth probe' sound from Empire Strikes Back.
50km a year mean 13 m a day. So no there isnt a poor bastard with a big candy cane pole walking 13m a day.
But dont get me wrong... Id do that job. You supply the dog teams and sled./
Someone should be able to put a little flag on top of a robot that could be used to mark it. I nominate Elon Musk.
@@litigioussociety4249 No I nominate Musk to do it personally physically. The guy lies too much to trust him for it.
@@00BillyTorontoBill My only problem with him is he's a corporatist, so he often receives tax subsidies, tax exemptions, or utilizes other regulatory legislation to aide his businesses.
136.99 M per day Maybe. Math
Great explanation.
Wasn't the north pole the actually magnetic south pole ?
Depends on how you define it. If Earth were a bar magnet, the magnetic north pole would be labeled "S" because the "N" end of another magnet would be attracted to it. Opposites attract, so since the magnetic north pole attracts the "N" ends of our magnetic compass needles, it's an "S". But you can still justify calling it North because it attracts the "N" ends of other magnets.
"North pole" of a magnet is short for "north-seeking pole." The N is the pole that points (approximately) to geographic north. Which means the earth's magnetic field at the north geographic pole is a south magnetic pole.
When you add in the fact that electrons flow in the opposite direction to conventional current, from negative to plus, it means electromagnetics is very confusing. :)
And that's before you get onto the complicated stuff like Maxwell's equations, Poynting vectors, etc.
1:28 - argh, topoGRAPHical, not topoLOGical.... :(
Nerd!
1:28 is a better time stamp.
@@xCorvus7x - yep, fixed!
Brilliant! Thanks
Great video. I was left with a doubt, though: why isn't the magnetic pole coincident with the geomagnetic pole? and why are they so far apart? Instead, it seems the geomagnetic poles should locally generate a locally vertical field, right?
It's not true there's nothing you can do to keep the magnetic north pole. You can invade Siberia.
Love the Empire Strikes Back sound effects
sorry but those arent the droids youre looking for,.
I was gonna say- was that an imperial probe droid?