Is Your Compass Wrong? | Neil deGrasse Tyson Explains...

[@StarTalk]

Check if you have a book or guide on how to use a compass! Does it include the correction for where you are?

[@alanjohnson2613]

Ask google for the magnetic deviation based on where you are.

[@CaptainMannyUK]

As a pilot the charts/maps we use have a variation line on them so we can use the compass and then find True north. We can use an acnym CDMVT Compass - Deviation - Magnetic - Variation - True

[@joshuawillard9813]

Two questions, if anyone can answer. I've always wondered what happens to a compass if you're standing on Magnetic North? Question 2: Does anyone think they know about how long the flip will take? The diagram showed it getting weak and then BOOM it was flipped. Almost instantly. On a geographic scale, how long is this "instant" flip? How many generations, I guess. I'm thinking it's gonna suck for a little while when it shuts down.

[@enterthecarp7085]

😂 no but your local map should! 👍🏼

[@TheSouthernSiren]

Do it have a how to guide when the poles shift🧭? 😌Absolutely it does not.... 😑 Is my compass wrong? Yep probably. Not even sure how to read that thing. Have zero idea what mother earth has up her sleeves...I just work here. 👍

[@1theonezman]

If I would’ve had this type of experience being taught science growing up, I would probably be a scientist. !!! my four kids have a newfound love for science because of you guys. Thanks and keep it up

[@isaackitone]

Understanding the qualitative stuff builds love for the more difficult quantitative stuff.....the math.

[@stephensmith3111]

"Science doesn't have all the answers." Science doesn't even have all the questions and that's what's just so much fun about science! -- a geologist emeritus

[@JamesCAlien]

Imagine that

[@theguy1122]

That's the problem with the current educational system.

[@englewoodmusic]

Yep

[@kenwelch198]

I grew up in a very rural area and had to master the compass at a early age. I spent most of my childhood wandering around in the woods. I think it's what gave me a permanent sense of direction.

[@stephensmith3111]

Dead reckonning, a nearly lost skill set around here. Good for you!

[@EmpyreanLightASMR]

I was talking to someone at a help desk a couple days ago and they kept pointing south while telling me where the parking lot was (that I came from), which was in a completely different direction 😂 I kept trying to correct him. funny how we get turned around inside buildings.

[@kenwelch198]

@@EmpyreanLightASMR my wife is directionally challenged. I never understood how someone could pull into a strange gas station and not know which way to go when leaving. But I've learned it's really a thing and not everyone keeps that directional compass going in their head all the time.

[@qshank2752]

@@kenwelch198 My Wife didn't know what suburb she was in for about 4 years when we moved west of Sydney. Honestly i think it was her laziness and she would just call me to figure out where she was. I stopped telling her after 4 years and now there is no issue. Yes we are still together somehow haha. there is 1 road between our house and said shops .

[@Anne5440_]

I'm very glad my dad taught me dead reckoning as a child.

[@DoctorTyrell]

I had heard from a couple of sources during grade school that the compass needle labeled North is actually the South magnetic side of said needle.

[@emuhill]

No, the compass needle labeled north is in fact magnetic north. It has to be in order to point north. The Earths north magnetic pole is what is actually a south magnetic pole.

[@stevehill1000]

Thank you. I enjoy your explainers. I wish this had been available when I was younger.

[@EmpyreanLightASMR]

A lot of it did... at the library I suppose. but some astronomy books are also hilarious because of how wrong they were about stuff.

[@HelicopterShownUp]

I'm sorry to inform you that your wish to change the past is not currently possible. Please choose another.

[@TucsonHippy]

A Compass Rose is also used by the aviation industry. Its large and painted on a specially prepared surface wherever aircraft maintenance is performed. Most airports have them. This is used to ensure that the standby compass is within tolerance of the aircraft in relation to the earth's magnetic field. It is an area away from all metallic objects including underground wires. All systems on the plane are powered up including the engines then the plane is situated so its pointing at specific compass directions. Starting at 000. The FAA states that a reading must be done full circle with readings done at not more than every 45 degrees. Some airlines require stopping every 30 or 15 degrees. When stopped at a compass heading the aircraft must sit still for at least a minute to let everything settle. Then you write on the compass card what the standby compass is reading. There can be no more than 10 degrees difference per the FAA. Again airlines can have more stringent accuracies. I was allowed a 7 degree tolerance when I performed them.

[@williamjones1590]

Yes true but your Rose needs to be updated regularly. Geomagnetic models which should be used to calibrate the Rose are produced every five years. If the Rose has not been update in a while you will need to add a correction to the marks on the Rose to ensure they are correct. Refer to your national geomagnetic website for the most up to date model.

[@SandyMasquith]

Thank you! That hurt my brain a little too. I love these explainers. :)

[@fn0rd-f5o]

magnetic deviation is something that is paid close attention to in aviation. if you ever look at an aeronautical chart you will notice that each airport has it's own magnetic deviation that has to be taken into account to correct north.

[@robwalton3686]

To correct south? so it shows north?

[@galens2543]

I’ve heard this called ‘declination’ in land navigation. Perhaps different terms for the different use cases.

[@fn0rd-f5o]

@@robwalton3686 no, so you know when you look at compass, that points north, you know how many degrees to add to the heading to go to actual geographic north.

[@fn0rd-f5o]

@@galens2543 I've only ever heard the term declination used in astronomy. The word we call it is "Deviation".

[@VoltisArt]

Within the same conversation, I'd say declination is the angle relative to geography. (Horizon in the case of astronomy?) Deviation is the change in same angle over time. Some people and dictionaries use them interchangeably, but that seems improper to me. It's like debt vs. deficit. (Politicians like to brag about lowering the yearly deficit while almost never lowering the total accrued debt.)

[@ante3807]

I can't get enough of these. So so fun. Thank you Dr. T and Lord Nice.

[@99bimmer]

In the Army, we called the difference between Grid North and Magnetic North the GM Angle, and according to our Land Nav manuals, it was due to a massive deposit in the Hudson Bay. In GA, the GM Angle was like 3 degrees, but in WA, it was @ 21 degrees

[@mikegoodwin2386]

Most topographic maps that hikers use, such as those from the USGS, will have this angle shown on the map, usually down near the bottom.

[@SamWitney]

Love this show, that was great guys. Always stuff we don't think about. Very cool!

[@stewartbonner]

was taught 'the north seeking pole' of the compass was marked 'N', not the north pole of the magnet.

[@mydogskips2]

Call it whatever you want, but the "north seeking pole" of the compass magnet is still "seeking" and pointing to the "south" magnetic pole of the Earth because that's the way magnets are attracted, opposites attract. It's just that Earth's magnetic South correlates with what we call geographic North.

[@dedmete]

These guys have such a delightful chemistry. Such a great show.

[@doug-Hakura]

I've finally worked my comment on the proposition that the compass needle is pointing at the opposite pole. The labels of North and South are human inventions are not really related to the polarity of the earth's magnetic field, thus we label the north arrow on the compass as North as that's the information that we are seeking. Do the magnetic field lines represent movement of energy or particles? If so then by determining ing the direction of such movement we can determine which pole corresponds with a north on a bar magnet.

[@EspionageTV]

I was a true boy scout through every rank until 18 also assistant scoutmaster pack 43 and troop 101 Flatwoods WV. Love learning about everything as a boy scout.

[@davethekiwibloke]

Love this explainer, fantastic stuff as usual. May I just add my 2-cents perspective to one of the points made...you state that a compass needle is polarised North, and therefore the magnetic North Pole of the earth is actually South. Firstly, these are completely arbitrary labels, but as a point of reference it is accepted that the North Magnetic Pole of the earth is "North" (as I said, it's a label)...what you have with a compass is the needle that is labelled with "N" is in fact the south pole of the bar magnet...the "N" does not indicate the polarity of the magnet, but the direction it is facing, due North.

[@isatousarr7044]

A compass doesn't point to the geographic North Pole but rather to the magnetic North Pole, which is constantly changing due to shifts in Earth's magnetic field. This field is generated by the geodynamo; the movement of molten iron in Earth's outer core. Unlike the fixed geographic poles, the magnetic poles drift and even flip over time, an event known as a geomagnetic reversal. When this happens, compasses would point south instead of north for a period of time. In the universe, magnetic fields exist in various forms, such as those around pulsars, which are rapidly rotating neutron stars with powerful magnetic fields. The Sun also has a dynamic magnetic field that changes every 11 years, affecting solar activity and space weather. These cosmic magnetic fields play crucial roles in astrophysical phenomena and our understanding of the universe. Given the ever-changing nature of Earth's magnetic field and its cosmic counterparts, how might future shifts impact navigation and our technology-dependent society?

[@Novabeann]

This episode is so good I had to take notes

[@patrickriley6079]

What I don’t get is Dr. Tyson says that when the needle points north that means Earth’s south magnetic pole is in the north because opposites attract. But isn’t the interplay just the result of our terminology? For example if instead of referring to a magnet as being magnetized north we said it was an A magnet (and the south magnetic pole was the B magnetic pole) then the interplay doesn’t exist? In other words, isn’t it the case that the North Pole being close to the south magnetic pole has more to do with the words we use than the physics of magnetism? In short, North magnetism is a separate concept for geographic north?

[@Mathijs303]

Thanks for sharing! At 3:42, I think maybe other people will get confused because you didn't mention the rotation around earth axis explicitly. Love you all and let me know if I can collaborate.

[@wiremonkeyshop]

I learn new things constantly from you, Neil! In school I had learned that the Earth's poles have reversed many times since inception. And that there are alternating magnetic stripes in the Earth's crust due to molten load stone solidifying at different historical earth pole reversals. Apparently the military discovered these stripes when surveying the ocean floors while developing technology to detect submarines. Fascinating stuff!

[@mydogskips2]

Lodestone, not load stone, but otherwise, you are correct. ; )

[@VoltisArt]

Those bands (stripes) are very clear in the ever-moving Pacific and Atlantic ocean floors, shown here: mrdata.usgs.gov/magnetic/map-us.html Ignore the gaps in data where you see only ocean, look for the gradient changes between green and magenta.

[@alanhehe4508]

I love the humor!! Chuck is hilarious (and very smart) and Neil can be pretty funny too!! It brings a lot to the show!! It was a great idea to have a comedian as cohost(s).

[@Love-kq7iy]

I love Chuck. Thank you for your contribution to this amazing series of explainers

[@owentheoutlaw_]

I always feel like Chuck and Niel are high and I love it.

[@englewoodmusic]

Neil Tyson vs Mike Tyson... idk bout you, but Neil hittin "Da Grass". Sorry bruh 😅

[@Awkward_platypus]

Bruh...

[@tonystarks8632]

It's great to see you guys having fun.😅

[@dat_chip]

Seriously, this was a good one! Sunspots come in north/south pairs? I did not know that. And I also didn't know that the sun's poles switch for every solar cycle.

[@noesaulnier]

14:10 in french we say " la rose des vents" literally " The wind rose " which is really pretty 😃

[@libbywakefield6202]

You to slay me with your sense of humor.Lovin, Laughter, and learning. Keep it up😂

[@mythbuster581]

Here in Brazil we call the compass rose " Rosa dos Ventos", wind rose.

[@JpVF_ArtStudio]

uncle phil and will took a different path than i anticipated. these guys are incredible together makes our soul lighter.

[@mrrock1201]

Brilliant…with movie snippets……more..brings the science home

[@FeLiNe418]

What makes you decide which opposite side of a magnet is north and which side is south?

[@callmevoid9407]

Amazing. Neil and Chuck, you made my day!

[@michaelccopelandsr7120]

Neil and Chuck for 2024

[@BullfrogActual]

Chuck said he understands but it hurts…me I had to rewind and take a second listen! 😆

[@DavidMKyalo-it1ok]

Chuck always adds colour to these scientific explainers. Thank you guys for another beautiful one. 😁

[@davidsasse40]

Pilot are also aware and correct for magnetic deviation. The magnetic deviation correction is on all the sectional aviation maps.

[@nickreno644]

Chuck, I have to say that through most of this I understood a majority of what Neil was saying but without the visualization representation, I would’ve looked exactly like you and I still look exactly like you even as he’s speaking, completely dumbfounded…😂😂😂❤❤

[@jamesgreenler8225]

I took my GPS on a hike near the town of Forks Wa . The forest canopy blocked my satellite signal and I got very lost . A compass would not have failed. I'd like to mention that I was with my twin brother and we discovered that in the only sub tropical rainforest in North America the moss grows ALL the way around the trees. Has we recorded our original bearing we could have torn apart the GPS and made a compass. It was scary. I'd like to mention that my brother and I had visited a fishing spot in Lapush on the Bogachiel River called the Bark hole . We heard sticks being banged together coming from a thicket of brambles in the impenetrable rain forest. We assumed it was maybe elk thrashing thier antlers in the brambles but 15 years later after the Twilight movies I'm not so sure it was Elk struggling in the brambles.

[@jimsanker989]

You guys are great! You two can talk with intelagint people and yet expane it to people like me Make a tv show like this thanks much

[@practive65]

What's funny is today, before I saw this video, I went down a rabbit hole looking into the changes of declination over the years because of what I learned from orienteering in boy scouts. I was wondering if I was lost today somewhere, would what I have remembered at that time be around the same or had it changed significantly enough that I would have to gather something new. Freaky actions over long distances, I tell ya.

[@Unkl_Bob]

I have been watching the motion and location change of the magnetic north pole . It seems to move around more bow than a couple of decades ago. It does not mice in one straight line.

[@victordeleon6939]

I can always get a good laugh and learn something at the same time watching you guys!!

[@albertwestbrook4813]

I've heard that migratory birds somehow sense Earth's magnetic field and use it to coordinate the direction of their flights. If Earth's field switched, I wonder if we'd see a disruption in their flight patterns.

[@Talon5Karrde]

@4:47 - That is backwards. We didn't care where the rotational pole was, we cared where the compass pointed. Because you had to look closely at maps to know if the N/S line was a pole like or a compass line.

[@TheSteveBoyd]

Question: When the magnetic poles reverse, during that time in which the magnetic field is "dead"... okay, call it a couple questions. First, how long would that period last, and second, is that like a "shields down" situation as it pertains to cosmic projectiles?

[@Crash8668]

It won’t ever stop. Eons from now it might be at the equator and then continue southward.

[@alanjohnson2613]

I understand the hurting part just got my latest structural engineering magazine as I am now retired so of the new theories hurt to try to decipher

[@iamdjc8792]

I love this I wish schools would go through this in detail

[@Nefville]

So what Neil is simply saying here is that the north pole is actually at the south pole but not exactly, the south pole is actually at the north pole but not quite, both poles move around as well as sometimes flipping polarity completely so that the north pole is actually at the north pole but not really and the south pole is actually at the south pole more or less though both still move around and will flip polarity again later. Got it.

[@ThreadedNail]

I think we all need a personal hype man like Chuck.

[@philmcdonald7956]

The flipping of the earth's magnetic field is well known. What is not known is how long the 'no field' part of the flip lasts. This is is hugely important because the earth will be exposed to full solar radiation during this period.

[@joshstenz]

S0?

[@philmcdonald7956]

@@joshstenz Really?

[@joshstenz]

@@philmcdonald7956 S0 is an acronym. There is a community of thought that this excursion is all part of a natural cycle which will likely lead to catastrophe. Yes, you are correct. The weakening of the magnetic field as it flips will expose us to all sorts of nasty stuff: solar radiation, cosmic rays, etc. Buckle up!

[@That-Guy-79]

Opposites attract so the needle is south pointing towards the north pole. Its just labeled N on compasses.

[@ghr1990]

How is the designation of north or south for poles, anything but arbitrary?

[@davej9228]

Exactly, the south pole on the compass needle is labeled n to indicate direction. Bit surprised Neil didn't explain that.

[@SuiLagadema]

I felt smart because I learnt it from my physics teacher in HS when we studied electromagnetic forces. Good way to start the day.

[@mckerrowsiding]

when i was in the milatry 50 years ago we were taught to use magnetic declination to determine an accurate location. No GPS paper maps just an angle and a physical compass

[@emuhill]

Assuming that a magnetic pole reversal occurs some time in my life, I'd have no problem fixing my compass to get the needle to point north again. All that is needed is a bar magnet to flip the compass needle's magnetic field.

[@felipet.m.]

Fun fact: In Spain the Compass Rose is called "Rosa de los vientos" Winds' Rose

[@randreas69]

The south compass needle points north so there. The south point of the compass was painted as north all the time, to find the north pole.

[@PapasDino]

So how long does it take for the actual reversal of the magnetic poles? During the period when the field decreases and reverses will there be no earth magnetic field thus no protection from from the solar wind's energetic particles. Thanks for another great session guys!

[@RajdeepDas2302]

Just curious, does the magnetic field of the Earth change clockwise or anti-clock wise?

[@jlhaslip]

Every Topographic map includes information about the map's magnetic declination. It gives you the degree of offset for the centre of the map AND the annual adjustment to calculate the precise angle to use for your route. Boy Scouts, military, and Geography major here.,

[@Rabanus]

Professor Dame Jocelyn Bell Burnell discovered pulsars in 1967 while she was a postgraduate student at New Hall (now Murray Edwards College) carrying out research at Cambridge's Cavendish Laboratory with Antony Hewish.

[@DaBlondDude]

I'm with Chuck ... that hurt 😂

[@isaackitone]

I imagined his brain boiling.

[@mikewalter9108]

Don't forget the 80's car Nissan Pulsar. Love your videos. Keep up the good work. Greetings from Michigan.

[@jeffdege4786]

When I was about 12, I was in the Scouts, and had a compass. I stuck it in a steel cookie tin, along with s🎉ome other junk, and forgot about it. 20 years later my mother told me to get my old junk out of her house, and I found the box, and the compass. When I took the compass out of tin, and it pointed south. Actually, i needed to hold it at significant angle in order for the needle to swing, but if I did, it pointed south. I thought that was neat, but it wasn't terribly useful, so I tossed it in a dresser drawer and ignored it. A couple of years later I checked it again and it had corrected itself back.

[@jerelull9629]

As I see it,the compass needle is labeled N because it *points* north. In reality, it's magnetically South and attracted to the North magnetic pole. Long-distance cruisers also discovered that their compasses are upside-down in the far southern hemisphere, so they have to get new compasses adjusted for the Southern hemisphere until they get right-side up in the Northern hemisphere. Weird, but I heard it from a reputable source. Boaters used to have to take deviation into account to get where they wanted to go in the days before GPS. Now we can just follow the GPS's indicator

[@TheOJDrinker]

Compasses aren't upside-down in the southern hemisphere, the north end still points north, and the south end still points south. (Until you go past the magnetic pole)

[@giolologi7002]

Always super interesting ! Just one question: what happens when the earth magnetic field “turns off” before switching over? Any impact on us / life while it lasts?

[@Kneedeepinstock]

Can you please do an episode addressing (Milankovitch Cycles) as they are important to understanding ice ages, sun cycles and fluctuations to earths climate 😎👍

[@MrAlfmen]

Does this mean that when the planetary dynamo slows and resets, there is a point in time when the compass will not be active at all? At the moment of the reset, there will be no magnetic pole to actually point to?

[@jacquesvandenberg1873]

Awesome work guys, loved this episode, thank you!

[@joseimpact]

neil almost broke my brain with this one

[@KennethScharf]

We named the magnet's north pole as the "North Seeking Pole".

[@charlesbrightman4237]

CONSIDER THE FOLLOWING: (A part of my theory of everything): In school we are taught that with magnetism, opposite polarities attract and like polarities repel. But inside the arc of a large horseshoe magnet it's the other way around, like polarities attract and opposite polarities repel. (I have proved this to myself with magnets and anybody with a large horseshoe magnet and two smaller bar magnets can easily prove this to yourself too. It occurs at the outer end of the inner arc of the horseshoe magnet.).

[@charlesbrightman4237]

THEORY OF EVERYTHING IDEA: (copy and paste from my files) Revised TOE: 3/25/2017b. My Current TOE: THE SETUP: 1. Modern science currently recognizes four forces of nature: The strong nuclear force, the weak nuclear force, gravity, and electromagnetism. 2. In school we are taught that with magnetism, opposite polarities attract and like polarities repel. But inside the arc of a large horseshoe magnet it's the other way around, like polarities attract and opposite polarities repel. (I have proved this to myself with magnets and anybody with a large horseshoe magnet and two smaller bar magnets can easily prove this to yourself too. It occurs at the outer end of the inner arc of the horseshoe magnet.). 3. Charged particles have an associated magnetic field with them. 4. Protons and electrons are charged particles and have their associated magnetic fields with them. 5. Photons also have both an electric and a magnetic component to them. FOUR FORCES OF NATURE DOWN INTO TWO: 6. When an electron is in close proximity to the nucleus, it would basically generate a 360 degree spherical magnetic field. 7. Like charged protons would stick together inside of this magnetic field, while simultaneously repelling opposite charged electrons inside this magnetic field, while simultaneously attracting the opposite charged electrons across the inner portion of the electron's moving magnetic field. 8. There are probably no such thing as "gluons" in actual reality. 9. The strong nuclear force and the weak nuclear force are probably derivatives of the electro-magnetic field interactions between electrons and protons. 10. The nucleus is probably an electro-magnetic field boundary. 11. Quarks also supposedly have a charge to them and then would also most likely have electro-magnetic fields associated with them, possibly a different arrangement for each of the six different type of quarks. 12. The interactions between the quarks EM forces are how and why protons and neutrons formulate as well as how and why protons and neutrons stay inside of the nucleus and do not just pass through as neutrinos do. THE GEM FORCE INTERACTIONS AND QUANTA: 13. Personally, I currently believe that the directional force in photons is "gravity". It's the force that makes the sine wave of EM energy go from a wide (maximum extension) to a point (minimum extension) of a moving photon and acts 90 degrees to the EM forces which act 90 degrees to each other. When the EM gets to maximum extension, "gravity" flips and EM goes to minimum, then "gravity" flips and goes back to maximum, etc, etc. A stationary photon would pulse from it's maximum extension to a point possibly even too small to detect, then back to maximum, etc, etc. (The 'stationary photon' does not really exist, it is mentioned basically only to help describe what a stationary photon would do.) 14. I also believe that a pulsating, swirling singularity (which is basically a pulsating, swirling 'gem' photon) is the energy unit in this universe. 15. When these pulsating, swirling energy units interact with other energy units, they tangle together and can interlock at times. Various shapes (strings, spheres, whatever) might be formed, which then create sub-atomic material, atoms, molecules, and everything in existence in this universe. 16. When the energy units unite and interlock together they would tend to stabilize and vibrate. 17. I believe there is probably a Photonic Theory Of The Atomic Structure. 18. Everything is basically "light" (photons) in a universe entirely filled with "light" (photons). THE MAGNETIC FORCE SPECIFICALLY: 19. When the electron with it's associated magnetic field goes around the proton with it's associated magnetic field, internal and external energy oscillations are set up. 20. When more than one atom is involved, and these energy frequencies align, they add together, specifically the magnetic field frequency. 21. I currently believe that this is where a line of flux originates from, aligned magnetic field frequencies. NOTES: 22. The Earth can be looked at as being a massive singular interacting photon with it's magnetic field, electrical surface field, and gravity, all three photonic forces all being 90 degrees from each other. 23. The flat spiral galaxy can be looked at as being a massive singular interacting photon with it's magnetic fields on each side of the plane of matter, the electrical field along the plane of matter, and gravity being directed towards the galactic center's black hole where the gravitational forces would meet, all three photonic forces all being 90 degrees from each other. 24. As below in the singularity, as above in the galaxy and probably universe as well. 25. I believe there are only two forces of nature, Gravity and EM, (GEM). Due to the stability of the GEM with the energy unit, this is also why the forces of nature haven't evolved by now. Of which with the current theory of understanding, how come the forces of nature haven't evolved by now since the original conditions acting upon the singularity aren't acting upon them like they originally were, billions of years have supposedly elapsed, in a universe that continues to expand and cool, with energy that could not be created nor destroyed would be getting less and less dense? My theory would seem to make more sense if in fact it is really true. I really wonder if it is in fact really true. 26. And the universe would be expanding due to these pulsating and interacting energy units and would also allow galaxies to collide, of which, how could galaxies ever collide if they are all speeding away from each other like is currently taught? DISCLAIMER: 27. As I as well as all of humanity truly do not know what we do not know, the above certainly could be wrong. It would have to be proved or disproved to know for more certainty.

[@charlesbrightman4237]

GRAVITY: (copy and paste from my files): WARNING: (CONTAINS EXISTENTIAL MATTERS): Here is the test for the 'gravity' portion of my TOE idea. I do not have the necessary resources to do the test but maybe you or someone else reading this does, will do the test, then tell the world what is found out either way. a. Imagine a 12 hour clock. b. Put a magnetic field across from the 3 to 9 o'clock positions. c. Put an electric field across from the 6 to 12 o'clock positions. (The magnetic field and electric field would be 90 degrees to each other and should be polarized so as to complement each other.) d. Direct a high powered laser through the center of the clock at 90 degrees to the em fields. e. Do this with the em fields on and off. (The em fields could be varied in size, strength, density and depth. The intent would be to energy frequency match the laser and em fields for optimal results, cancelling out the em modalities of the laser, thereby leaving behind the gravity modality.) f. Look for any gravitational / anti-gravitational effects. (Including the utilization of ferro cells so as to be able to actually see the energy field movements.) (And note: if done right, it's possible a mini gravitational black hole might form. Be ready for it. In addition, it's possible a neutrino might be formed before the black hole stage, the neutrino being a substance with a very high gravitational modality with very low 'em' modalities.) (An alternative to the above would be to direct 3 high powered lasers, or a single high powered laser split into 3 beams, each adjustable to achieve the above set up, all focused upon a single point in space.) 'If' effects are noted, 'then' further research could be done. 'If' effects are not noted, 'then' my latest TOE idea is wrong. But still, we would know what 'gravity' was not, which is still something in the scientific world. This test can speak for itself. It will either be true, partly true, or not true at all. It will either show what gravity truly is, might be, or is not. Science still wins either way and moves forward. * And note: Whether my gravity test or another's, a gravitational black hole would have to be formed to prove the concept as being really true. A gravitational black hole that 'if' self fed itself, could literally wipe out this Earth and all on it, possibly this solar system, possibly put a black hole in this section of our galaxy, and potentially even causing a ripple effect in this galaxy and surrounding universe. But hey, if it does, no worries. Nobody would be left to prosecute those who did so. (Possibly famous last words: "Hey, it worked. Ooooppppssss.................) But as NASA has already proven that low gravity conditions over a prolonged period of time is harmful to the human species, and large rotating space ships won't really work for space bases on planets and moons, those space bases probably being needed somewhere along the way out of this solar system and galaxy, we need to figure out what gravity truly is and see if we can generate artificial gravity so as to have smaller space ships and proper gravity conditions for space bases on planets and moons. Otherwise, at least all human life will most probably die and go extinct one day. Currently, no exceptions. * Added note: Just trying to save at least 1 single species from this Earth to exist beyond this Earth so that life itself from this Earth has continued meaning and purpose to. Gives me something to do while I exist, otherwise, what is it all and everything for? Even if my TOE idea were correct, but if it did not help species survive beyond this Earth, what good would it ultimately be? So, are you feeling lucky? Doing nothing and at least the entire human species eventually dies and goes extinct with a high degree of certainty. Doing a gravity test, (mine and/or another's), and there is at least a slim chance of literally wiping out this entire Earth and all on it, and possibly more. Do you and other's truly want me to prove my TOE idea as being really true? But also: Questions: Are at least some black holes in this universe due to a species who were trying to discern what 'gravity' truly was, came up with a test to do so, were successful, but the black hole generated (to prove what gravity truly was) self fed itself and wiped them and at least their entire planet out? What species might have existed where a black hole now resides? (Since all of life itself is ultimately meaningless in the grand of scheme of things anyway, do the gravity test and see what occurs?) * Added note: Suggestion: 'IF' society did not want to do the gravity test, one suggestion might be to at least create a model as if it were true, then see how that model matches with observations and predictions. It might be possible to discern the theory of everything without actually generating a gravitational black hole (which would definitely prove the TOE idea as being really true).

The Compass Rose is named Rose des Vents (Rose of the Winds) in French. We love to be different for no good reason.

[@raymondamador1487]

I think the thing that makes our core unique is the ammount of Plutonium and Uranium in our core. The only substances that could keep or Core hot for 4.6 billion years and counting....

[@thedalailmao]

It would've been easier to have started by saying that the geographical North and the magnetic South are in the Arctic and the geographical South and the magnetic North are in the Antarctic. I don't think Chuck would've looked as confused. Still, the comedy is gold.

[@Snoodlehootberry]

Even more interesting is that there are magnetic dead sports on earth. Also, because of iron lay down in strata, it can be seen that this magnetic flip has occurred in the past with 100% certainty

[@vladciobanu7480]

Amazing explanation. Thank you!!

[@dannybell926]

I cant get enough of these explainers

[@Bratfalken]

Living up at the 65th Latitude in Sweden, the magnetic poles wandering has changed many degrees since my childhood in the 60ths.

[@jamiemackey1729]

At airports the runways are numbered by the magnetic heading when lined up for takeoff or landing. They will change this number as the magnetic north moves changing the actual magnetic direction

[@Kahuna54]

I believe the compass needle has the magnet positioned so the N points North, etc.

[@gregrice1354]

Very entertaining and educational, ad usual, Dr. Neil. Thank you. Please explain the issue of molten core magnetism, and the physics of magnetism when the magnetic effect is overridden - when you heat a magnet, to certain temperature, it is no longer attractive/attracting to ferrous metals. So, dies the heat of Earth's core override magnetic attractions where it is hot and molten?

[@sergiollag1]

so when the magnetic field flips and disappears, r we gonna be vulnerable to the sun radiation before the magnetic field reappears?

[@stevenboughner7255]

This brings up Navigation using a compass if you are on a ship and use only a compass you could be miles from your port of destination. To become a Captain of a ship of certain size you had to pass a navigation test because of the difference between true north and magnetic north. Interesting to now know that magnetic north is moving and science and engineering have made GPS satellites to help us all navigate.

[@GFlCh]

About the process of Earth's magnetic field reducing to 0, then reversing, how long is this process expected to take to complete? And knowing that Earth's magnetic field protects us from things like Cosmic Rays and Solar Radiation, how long will we be unprotected during the "flip"?

[@mydogskips2]

My understanding is that it takes centuries, it doesn't happen in a matter of days or weeks, or even years. For humans, 100 years is a long time, but from the perspective of the Earth, 100 years is the mere blink of an eye.

[@stephensmith3111]

We know that magnetic pole reversals have occurred many times in the past and are not associated with significant extinction events. However those were all long before our modern technological civilization. As the magnetic field gradually fades, essentially disappears for a while, and then gradually ramps back up in the reverse polarity; how will this affect the power grid? We will lose our protection from the solar wind and a direct hit by a coronal mass ejection with our screens down [ Star Trek reference 🖖] could get really nasty. "Live long and prosper."

[@michah4341]

I asked myself too how the atmosphere remaind in these times without a magnetic field and how all the traveling birds survived without any orientation. would be very happy if someone could clear me up🙏

[@MzeeMoja1]

​@@michah4341 The birds will just have to taxi for a bit

[@EmpyreanLightASMR]

i know, he didn't say how long it takes for the flip to happen. a day? a second? 20 years?

[@Superpowerfulguy]

These are the questions I wished they answered! Instead we have to watch Neil walk Chuck through another simple concept he apparently understood in a previous vid but doesn't now 😮‍💨

[@Klaatu2Too]

@@Superpowerfulguy Perhaps this will answer some questions: kzbin.info/www/bejne/gmSsaKSdpKuCq5I

[@andrewilliam69]

Would the flip of magnetic “north” cause any wider problems for systems or equipment?

[@mungaikihanya4340]

The pole of the magnet is called "north seeking" pole. It's not called the "north" pole.

[@Jack_McKalling]

What makes you believe that the magnetic north is not on the same hemisphere as geographic north? Maybe magnetic north is also near the north pole, but they simply mislabel the south and north ends of compass needles just to compensate for the fact that it is the opposites that attract. So maybe the compass needle that is pointing north is actually the south end of the needle.

[@RT-mn2pb]

Chuck, I have to say, my wife and I love "The Chuck Show", along with your frequent guest Neil. I'm a nerd, so I'm usually tracking with your guest, Neil. My wife however, is definitely on the same page you are. And she had the exact same confused expression on her face when Neil said the compass' North end points to the South magnetic pole at the North pole. Total confusion. She said wait wait pause the show, what did he say. Her heart goes out to ya. Oh, and greetings also to your special cameo guest Pizza Rat.

[@frankh5790]

I tired at several points to give a thumbs up only to release i already did. Good stuff. (Ship captain) its important

[@marianoquiroga1976]

Recent studies found that earth rotation has been aligning with the rotation of its core. Does this mean that our magnetic field could be weakening? Might this imply some nearby flipping of the magnetic field?

[@sekaramochi]

Please please please never stop ♥️

[@Gordon_L]

People who sail and work on the sea learn about variation and deviation when plotting a course on the chart . If you have a gyro compass then you don't need to worry about variation .

[@petercorcoran2702]

If we were to geo-engineer Mars, get it producing atmosphere from life, what would be the point if some random solar storm could blow away the atmosphere for lack of a magnetosphere?

[@ericmeador148]

When they are discussing the field resetting it's self it makes me think of a slinky before it goes to the next step all the energy builds up before being redistributed

[@shailendradeopa2089]

Great show. Thanks for the explanation. I have one question as to what will happen when the pole passes through our equator. Will earth also start pulsating radio waves?

[@chrisfleming701]

Only if it was a neutron star.

[@Anuchan]

How high above the Earth's surface can you go before a compass no longer aligns north?

[@ScienceBusted]

How far away compass will point to a toy magnet 5000 Gauss? Imaginary Earth magnetic pole is 0.6 Gauss.