Oh planets last little bit how does the magnetic field affect us is the magnetic field important to human beings this should only take a couple minutes is the magnetic field important to human beings yes or no absolutely absolutely our magnetic field is important because if our magnetic field were not there we would all die didn't you guys know what would kill us what does our magnetic field protect us from what main thing is is out there trying to kill us that our magnetic field protects us from so the magnetic field can't block asteroids okay asteroids are our to just large physical objects what it protects us from is the Sun remember when we were talking about comets and we talked about how the comet's tail forms and why it points away from the Sun what did I say was coming out of the Sun that was causing those tails of those comments to blow away from the Sun remember guys remember what that was called see if you do the solar wind right the solar wind yes the sun's breaking wind yes the solar wind the Sun is constantly blowing charged particles out in the form of the solar wind and those are very high energy and that solar wind makes it all the way to earth it makes it all the way to all the planets and if that solar wind were able to come all the way down to the surface of our planet that would kill us but luckily for us the solar wind is made out of charged particles and so our magnetic field will actually block it for us remember we said that magnetic fields can be formed by electricity well charged particles are also related to electricity and it turns out when the solar wind gets to us solar wind likes to follow magnetic fields so when that solar wind gets up here to our magnetic field it's ready to hit earth but then it ends up turning and following our magnetic field and essentially what that does is it makes our magnetic field work like a bubble in that solar wind protecting us from it which also means remember I said that Mars had a magnetic field at one point but because it is cooled off its core cooled off over time it lost that magnetic field well guess what's slowly happening to the core of our planet guess what's slowly happening to the core of our planet huh it's slowly cooling off and again this has nothing to do with global warming that's a surface thing that has to do with our atmosphere and the heat of the Sun I'm talking about the internal core temperature right here this is something different this has nothing to do with global warming but if if the core of our planet is cooling off then what does that mean will eventually happen to our magnetic field what will eventually happen yeah eventually our magnetic field will turn off if our planet is allowed to completely cool off in its core which is something we have nothing to do with we will eventually die right now oh okay okay luckily do you don't have to worry about that that's gonna take billions of years okay that's gonna take billions of years but it is something that slowly happens now again nothing to do with global warming that's later okay now one quick thing what's the weakest part of our magnetic field where's the weak points we do have let me give you a hint we have two weak points where are those weak points yeah at the North and South Pole and someone says everything out there is trying to kill us yeah I mean the space not a very hospitable place for a human being right but yeah the poles the poles are the weak point so sometimes solar wind makes it to our planet at the poles okay sometimes solar wind makes it to our planet at the poles but give me a yes or no on this does the solar wind have a direct hit on the poles does the solar wind get to have a direct hit on our poles yes or no and by direct hit I mean does it get to come straight out of the Sun and just hit our poles no because of the orientation of our magnetic field any solar wind that makes it to our poles would make it by hitting our magnetic field and being dragged around it and pulled in to the poles by our magnetic field and while it does that it loses most of its energy so luckily for us even if you were standing right at one of the poles when that solar wind made it in it's such a low energy that it never makes it to the ground okay and even if it did it's pretty low energy by that point but essentially what's going to happen is that solar wind will hit the air and give its energy to the air which will cause the air to glow for a short period of time does anybody know what I'm talking about right now does anybody know what this phenomenon is called when the solar wind causes that air at the poles to glow yeah this is called an Aurora also known as the northern and southern lights okay and if you want to know how to spell Aurora that's that's kind of a hard one to spell Aurora is a you are oh are a ok Aurora are just solar wind hitting the air now quick question have any of you guys seen this from Florida if you're in Florida have any of you guys ever seen this from Florida no have any of you guys ever seen it at all and you guys ever seen it I've never actually been in the right place to actually see one of these where would you have to go to see these yeah you would be able to see these up in up in Alaska up in Canada or if you went down to southern Argentina or Australia you can see them so if you go close to the polls close to the weak points in our magnetic field you can see this really cool light show and I would definitely recommend look up some videos of this and it's not always green sometimes it's red and the reason it shows up these green and red colors is because our atmosphere is made out of nitrogen and oxygen and essentially every substance is gonna glow with its own fingerprint we'll going back to test one stuff remember every substance has a different set of wavelengths it likes to give off well oxygen and nitrogen like to give off these greens and Red's okay so if we were to go to another planet that has an aurora would it necessarily be green and red would we expect the Aurora's on other planets or or a on other planets to be the same colors as the Aurora's on earth yes or no no because the atmospheres of the other planets are made of other things their Aurora's will show up in different colors so here's here's what I want to get at which planets have or or a any planet that has an atmosphere and a magnetic field will have a roar a you need to have both okay so we know Earth has an atmosphere and a magnetic field so we have an aura we have a roar right right same with all the jovian planets all the jovian planets have atmospheres and they have magnetic fields so they can have this I'll actually show you a photograph of some of this happening on other planets when we talk about other planets but there's light up in different colors because their atmospheres made out of something different but here we go here we go your son is able to answer some of these questions good job good job good job good job you good job thanks for answering my questions now here we go check this out Oh Liam thanks Liam good job on answering those questions all right now last question for you guys and then we'll head out of here let's look at the other terrestrial planets and see which ones would have Aurora we said earth does we said earth does how about Mars what bars have a roar a yes or no just give me a yes or no on these with Mars have a roar a remember I'm going to tell you this one's no that's okay that's okay this one's no remember we said Mars doesn't have a magnetic field you need to have a magnetic field and an atmosphere in order to have an Aurora okay so Mars doesn't have them at least not in the same form that we do okay how about Venus what Venus have an Aurora yes or no remember it's got to have a magnetic field and an atmosphere it does have an atmosphere but it doesn't have a magnetic field remember it rotates too slow so it's not gonna have a magnetic field and then finally over here mercury has a magnetic field is weak it's got a magnetic field would mercury have an Aurora I'm gonna go ahead and say no why doesn't mercury get to have an Aurora what's it missing no atmosphere right right and the moon also would not have an Aurora so basically out of the terrestrial planets the earth is the only one that gets northern and southern lights it's the only one that can have a roar a but the jovian planets all have an atmosphere and a magnetic field so they don't so that makes up that so they the jovian planets do have a roar a because they do have the atmosphere and a magnetic field okay