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simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | now , negative plus 6 . this is the exact same thing as 6 minus x if you just rearrange the two terms . negative x plus 6 is the same thing as 6 plus negative x , or 6 minus x . | is the concept ofconditionthe same thing ofdomain ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | this is the exact same thing as 6 minus x if you just rearrange the two terms . negative x plus 6 is the same thing as 6 plus negative x , or 6 minus x . now you could cancel them out . | you take ( x+6 ) ( -x+6 ) times negative one twice , wo n't you have to take ( x+6 ) times negative one twice ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | we have x plus 6 , and i 'm going to distribute this negative 1 . if i distribute the negative 1 , i have negative 1 times x is negative x . negative 1 times negative 6 is plus 6 . and then i have a negative 1 out here . | why the second negative one ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | let 's add x to both sides . we get 6 is equal to x , so the domain of this function is equal to the set of all real numbers except 6 . so , x could be all real numbers except 6 , because if x is 6 then you 're dividing by 0 , and then this expression is undefined . | why ca n't the domain be a set of all complex numbers except 6 ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | so when does that happen ? six minus x is equal to 0 . let 's add x to both sides . | what is that squiggly line that sal draws ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | the domain is a set of all x values that you could input into this function and get something that is well-defined . the one x value that would make this undefined is the x value that would make the denominator equal 0 -- the x value that would make that equal 0 . so when does that happen ? | why any number to the power of zero equals to one ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | this is the exact same thing as 6 minus x if you just rearrange the two terms . negative x plus 6 is the same thing as 6 plus negative x , or 6 minus x . now you could cancel them out . | to keep the final answer , -x-6 , equivalent to the first expression , ( x^2-36 ) / ( 6-x ) , would n't you have to keep the constraint that x can not equal 6 ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is equal to that . the domain is a set of all x values that you could input into this function and get something that is well-defined . the one x value that would make... | can i please get an explanation on what a `` domain '' is ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | we have x plus 6 , and i 'm going to distribute this negative 1 . if i distribute the negative 1 , i have negative 1 times x is negative x . negative 1 times negative 6 is plus 6 . and then i have a negative 1 out here . i have a negative 1 times negative 1 , and all of that is over 6 minus x . now , negative plus 6 . | are the two negative 1 's imaginary ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | and in this case , a is x and b is 6 . this top expression right here can be factored as x plus 6 times x minus 6 , all of that over 6 minus x . now , at first you might say , i have a x minus 6 and a 6 minus x . | i 'm wondering why did n't sal just write the denominator as - ( x-6 ) right at the start ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | it 's of the form a squared minus b squared , and we 've seen this multiple times . this is equivalent to a plus b times a minus b . and in this case , a is x and b is 6 . | 3 ; 49 is n't a-b just the absolute value of b-a ? |
simplify the rational expression and state the domain . let 's see if we can start with the domain part of the question , if we can start with stating the domain . now , the domain is the set of all of the x values that you can legitimately input into this if you view this as a function , if you said this is f of x is ... | the domain is a set of all x values that you could input into this function and get something that is well-defined . the one x value that would make this undefined is the x value that would make the denominator equal 0 -- the x value that would make that equal 0 . so when does that happen ? | if you have p ( x ) =11x^2-22x^3/6x-12x^2 then the domain would be what ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | even though these are depicted to scale , they 're way further away from the sun than this makes it look . so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . | was the sun created before the earth or after ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so this obviously here is the sun . and i think most people appreciate that the sun is much larger than the earth , and that it 's pretty far away from the earth . but i do n't think most people , including myself , fully appreciate how large the sun is or how far it is away from the earth . | is the earth orbit elliptical or cicular ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | hopefully that just starts to blow your mind when you think about the scale of the sun , the earth , and how far the earth is away from the sun . and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the solar system . and especially when we st... | and if elliptical how is the au compared to the minimum and the maximum distances ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how do i calculate a planet that is 6.5 years of a period , what is the distance from the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | does the sun have an orbit ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you can get into a car for an hour , hour and a half , and go about 100 miles . and on the earth that would be about this far . it would be a speck that would look something like that . | how far is the moon from the earth ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . | what is dark energy and dark matter ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | it would be a speck that would look something like that . that is 100 miles . and also to get us a bit of scale , let 's think about a speed that at least we can kind of comprehend . | why does sal use kilometers and meters instead of miles and feet ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so we 're talking about 150 million kilometers . so if we 're going at 1,000 kilometers an hour , it would take us 150,000 hours at the speed of a bullet or at the speed of a jet plane to get to the sun . and just to put that in perspective , if we want it in days , there 's 24 hours per day . | is it true that 1,000,000,000 earths can fit in the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you can get into a car for an hour , hour and a half , and go about 100 miles . and on the earth that would be about this far . it would be a speck that would look something like that . that is 100 miles . | i dont really know if this would belong here but , if mars hit the earth how big would the crater be ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | but we 'll at least give our best shot . so i think most of us watching this video know that this right here is earth . and just to get a sense of scale here , i think probably the largest distance that we can somehow relate to is about 100 miles . | how do scientist 's know how old the `` earth '' is ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and also to get us a bit of scale , let 's think about a speed that at least we can kind of comprehend . and that would be , maybe , the speed of a bullet . maybe we ca n't comprehend it , but i 'll say this is the fastest thing that we could maybe comprehend . | does anyone know what the exact speed of a bullet or a jet speed ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | the earth is just this little thing over here , smaller than a raindrop . if i were to draw it on this scale , where the sun is even smaller , the earth would be about that big . now , what is n't obvious , because we 've all done our science projects in third and fourth grade -- or we always see these diagrams of the ... | if the sun is so big and hot why wo n't the earth over heat ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | this is a little dust thing flying around this sun . and as we go further and further out of this solar system , you 're going to see even this distance starts to become ridiculously small . or another way to think about it -- if the sun was about this size , then the earth at this scale would be about 200 feet away fr... | so if humans make a really small , skinny plane will it go faster ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how do you measure the temperature of the sun 's core ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if you were to travel at the speed of a bullet or the speed of a jetliner , at 1,000 kilometers an hour , it would take you 40 hours to circumnavigate the earth . and i think none of this information is too surprising . you might have taken a 12- or 15-hour flight that gets you -- not all the way around the earth --... | do you think that aliens or other life forms exist somewhere in the universe ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | why does n't the sun suck in any of the planets ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and just to get a sense of what 4,000 is -- actually , since i have the calculator out , let 's do the exact calculation . it 's 109 times the circumference of the earth times 40 hours . that 's what it would take to do the circumference of the earth . so it 's 4,360 hours to circumnavigate the sun , going at the speed... | how do you calculate the circumference of the earth ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and just to give a sense of how far this is , light , which is something that we think is almost infinitely fast and that is something that looks instantaneous , that takes eight minutes to travel from the sun to the earth . if the sun were to disappear , it would take eight minutes for us to know that it disappeared o... | since the earth 's orbit is not a perfect circle , do they take the average distance from the sun to determine 1 au ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you can get into a car for an hour , hour and a half , and go about 100 miles . and on the earth that would be about this far . it would be a speck that would look something like that . | would the measurement 1 au ever change over time , for example if the radius of the earth 's orbit gets bigger or smaller ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you might have taken a 12- or 15-hour flight that gets you -- not all the way around the earth -- but gets you pretty far . san francisco to australia , or something like that . so right now these are n't scales that are too crazy . | can two planets orbit each other ( like magnets ) , or will they just collide in the center ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . it would n't even be a pixel . but it would be 150 million kilometers from the earth . | so if the sun did die we would n't know for 8 min ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the solar system . and especially when we start going beyond the solar system . | why venus the hottest planet in our solar system ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | for how long has the sun been burning ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you might have taken a 12- or 15-hour flight that gets you -- not all the way around the earth -- but gets you pretty far . san francisco to australia , or something like that . so right now these are n't scales that are too crazy . | are there any other solar systems like ours , and is there anywhere else that life could be sustained such as our planet ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | how long sunlight take to touch the surface of earth from the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if this is the sun right here , at this scale you would n't even be able to see the earth . it would n't even be a pixel . but it would be 150 million kilometers from the earth . | if space is black , which is still a colour from light 's reflection , then why black and not blue or red or yellow or even multiple colours ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | what will happen if the sun suddenly disappears ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if this is the sun right here , at this scale you would n't even be able to see the earth . it would n't even be a pixel . but it would be 150 million kilometers from the earth . | the light would stop coming 8 minutes after the actual event , but wo n't the sudden absence of gravity tell us about its disappearance ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if this is the sun right here , at this scale you would n't even be able to see the earth . it would n't even be a pixel . but it would be 150 million kilometers from the earth . | so wo n't information travel faster than light ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and also to get us a bit of scale , let 's think about a speed that at least we can kind of comprehend . and that would be , maybe , the speed of a bullet . maybe we ca n't comprehend it , but i 'll say this is the fastest thing that we could maybe comprehend . | or will there be some sort of 'gravity waves ' through space time that would travel at the speed of light ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | anyway , i 'm going to leave you there . hopefully that just starts to blow your mind when you think about the scale of the sun , the earth , and how far the earth is away from the sun . and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the... | how does knowing the scale of the sun and earth help us in any way ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and that would be , maybe , the speed of a bullet . maybe we ca n't comprehend it , but i 'll say this is the fastest thing that we could maybe comprehend . it goes about -- and there are different types of bullets depending on the type of gun and all of that -- about 280 meters per second , which is about 1,000 kilome... | why ca n't we breath in space and why do we float in space ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and on the earth that would be about this far . it would be a speck that would look something like that . that is 100 miles . | if we were to put oxygen in space would it affect anything ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you can get into a car for an hour , hour and a half , and go about 100 miles . and on the earth that would be about this far . it would be a speck that would look something like that . | how do we breath in earth since there is no coat around it that would prevent oxygen from escaping the earth ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | is the sun we see in pictures in google ( seen as a giant red ball of lava and fire ) the same sun we see if we were to look at it in outer space using very very special sunglasses ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how do u measure the temperature of the sun 's core ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | if i were to actually do it at scale , this little dot right here , which is the earth , this speck -- i would have to put this back about 50 feet away from the sun . 50 or 60 feet away from the sun . if you were to look at the solar system -- and obviously there 's other things in the solar system , and we 'll talk mo... | if you put all the planets in the solar system together , how big would it be compared to the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | the earth is just this little thing over here , smaller than a raindrop . if i were to draw it on this scale , where the sun is even smaller , the earth would be about that big . now , what is n't obvious , because we 've all done our science projects in third and fourth grade -- or we always see these diagrams of the ... | would all the planets , mercury , venus , earth , mars , jupiter , saturn , uranas and neptuneput together be as big as the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | even though these are depicted to scale , they 're way further away from the sun than this makes it look . so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . | is one au the distance from the earth to the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how hot is the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and just to get a sense of what 4,000 is -- actually , since i have the calculator out , let 's do the exact calculation . it 's 109 times the circumference of the earth times 40 hours . that 's what it would take to do the circumference of the earth . so it 's 4,360 hours to circumnavigate the sun , going at the speed... | how was the circumference of the earth actually measured ... ... and when was it done and by who ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and this is also roughly the speed of a jet . so just to give a sense of scale here , the earth 's circumference -- so if you were to go around the planet -- is about 40,000 kilometers . so if you were to travel at the speed of a bullet or the speed of a jetliner , at 1,000 kilometers an hour , it would take you 40 hou... | why is pluto no longer a legal planet ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | does sun exert different amounts of gravitational pull for different planets ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and on the earth that would be about this far . it would be a speck that would look something like that . that is 100 miles . | how would a gas giant planet form ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and on the earth that would be about this far . it would be a speck that would look something like that . that is 100 miles . | for light to reach the physical lens of the telescope or do to the magnification would the observer notice sooner ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | or , if we divided by 365 , roughly 17 years . if you were to shoot a bullet straight at the sun it would take 17 years to get there , if it could maintain its velocity somehow . so this would take a bullet or a jet plane 17 years to get to the sun . | sorry if this is off topic at all , but at about you said `` if it could maintain its velocity somehow '' i 'm curious , how does an object lose velocity in space ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so this obviously here is the sun . and i think most people appreciate that the sun is much larger than the earth , and that it 's pretty far away from the earth . but i do n't think most people , including myself , fully appreciate how large the sun is or how far it is away from the earth . | is it pulled by earth 's gravity ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . it would n't even be a pixel . but it would be 150 million kilometers from the earth . and this distance right here is called an astronomical unit -- and we 'll be using t... | if so , would n't velocity increase once it escaped earth 's gravity ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | is the sun a star ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | you can get into a car for an hour , hour and a half , and go about 100 miles . and on the earth that would be about this far . it would be a speck that would look something like that . | what would your way of destroying the earth be ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | these are the end zones -- one end zone , another end zone . and if you were to stick something -- maybe the size of a medicine ball , a little bit bigger than a basketball , at one end zone -- this little speck would be about 60 yards away , roughly 60 meters away . so it 's this little speck . | what 's a medicine ball ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | will our sun turn into a white dwarf star or black hole after its supernova explosion ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and also to get us a bit of scale , let 's think about a speed that at least we can kind of comprehend . and that would be , maybe , the speed of a bullet . maybe we ca n't comprehend it , but i 'll say this is the fastest thing that we could maybe comprehend . | can anyone tell me how much time would it take travelling from north pole to south pole ( at the speed of a bullet ) ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | but it would be 150 million kilometers from the earth . and this distance right here is called an astronomical unit -- and we 'll be using that term in the next few videos just because it 's an easier way to think about distance -- sometimes abbreviated au , astronomical unit . and just to give a sense of how far this ... | what is a astronomical unit ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | now , what is n't obvious , because we 've all done our science projects in third and fourth grade -- or we always see these diagrams of the solar system that look something like this -- is that these planets are way further away . even though these are depicted to scale , they 're way further away from the sun than th... | last night my two younger sisters had asked me , since the sun makes the earth 's sky blue , why does n't it make outer space 's sky blue ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | although , even for me , the earth itself is a pretty mind-blowingly large object . now , with that out of the way let 's think about the sun . because the sun starts to approach something far huger . | let me rephrase : how many earths could fit in the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | how many kilo meters are around the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . | how many galaxies are there in the observable universe ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | if a bullet traveling at ( roughly ) 1,000 kph takes 40 hours to go around the earth , than how long would it take to go around jupiter ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and on the earth that would be about this far . it would be a speck that would look something like that . that is 100 miles . and also to get us a bit of scale , let 's think about a speed that at least we can kind of comprehend . | what is the conversion of 40,000km into how many miles would that be ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . | are aerodynamics important in outerspace ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and this is also roughly the speed of a jet . so just to give a sense of scale here , the earth 's circumference -- so if you were to go around the planet -- is about 40,000 kilometers . so if you were to travel at the speed of a bullet or the speed of a jetliner , at 1,000 kilometers an hour , it would take you 40 hou... | why is earth the only planet to sustain life ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | is the sun made of lava ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | even though these are depicted to scale , they 're way further away from the sun than this makes it look . so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . | is earth and sun are inter related or helped each other while they were created millions and millions years ago ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | why do all the planets rotate around the sun instead of earth ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | during an eclipse is the sun fully blocked out ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | what is sun made up off ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how big is jupiter compared to the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | if you were to shoot a bullet straight at the sun it would take 17 years to get there , if it could maintain its velocity somehow . so this would take a bullet or a jet plane 17 years to get to the sun . or another way to visualize it -- this sun right over here , on my screen it has about a five- or six-inch diameter ... | i mean it heats our earth up and it would take roughly 17 years to travel at the speed of a bullet/jet how can they know how big the sun actually is ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . | but what do you mean by the hydrogen and helium are in plasma form ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . | what is plasma form vs gas form ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | sorry for all the questions , but it show a diagram and i want to know how many jupiters go into the sun and how many earths go into jupiter ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | when in history were we first able to calculate the size of the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | if you were to shoot a bullet straight at the sun it would take 17 years to get there , if it could maintain its velocity somehow . so this would take a bullet or a jet plane 17 years to get to the sun . or another way to visualize it -- this sun right over here , on my screen it has about a five- or six-inch diameter ... | in the case of the jet plane flying to the sun , as it got closer to it , would the sun 's gravitational pull make the plane go any faster than 1000 km ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the solar system . and especially when we start going beyond the solar system . | has anyone made and accurate scale model of the solar system ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | how do we know how long is the earths diameter is ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how do we know how big the sun is ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and so that is -- 24 hours in the day -- that is 181 days . it would take you roughly half a year to go around the sun at the speed of a jetliner . let me write this down . | is this possible for human to create a space ship which can take speed of light ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so you could imagine , if you had a football field -- let me draw a football field . these are the end zones -- one end zone , another end zone . and if you were to stick something -- maybe the size of a medicine ball , a little bit bigger than a basketball , at one end zone -- this little speck would be about 60 yards... | what is the definition of a star 's habitable zone ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | how did you calculate the circumference of the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | even though these are depicted to scale , they 're way further away from the sun than this makes it look . so the earth is 150 million kilometers from the sun . so if this is the sun right here , at this scale you would n't even be able to see the earth . | is it true that you can fit about 1 million earths inside the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | anyway , i 'm going to leave you there . hopefully that just starts to blow your mind when you think about the scale of the sun , the earth , and how far the earth is away from the sun . and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the... | how many light years is the earth far away from the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | anyway , i 'm going to leave you there . hopefully that just starts to blow your mind when you think about the scale of the sun , the earth , and how far the earth is away from the sun . and then we 're going to see even those distances , even those scales , are super small when you start thinking about the rest of the... | how do we measure how far away is the sun from the earth ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | when mr. khan talks about how long it would take a jet , or a bullet to go around the earth , is this calculation supposing that the earth is not rotating ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | so if we do that same thought exercise there -- if we said , ok , if i 'm traveling at the speed of a bullet or the speed of a jetliner , it would take me 40 hours to go around the earth . well , how long would it take to go around the sun ? so if you were to get on a jet plane and try to go around the sun , or if you ... | and , when the earth is rotating , how long would it take to go around the earth both ways ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | half a year . the sun is huge . now , that by itself may or may not be surprising -- and actually let me give you a sense of scale here , because i have this other diagram of a sun . | w.k.t sun has more gravitational force than the earth , then why does n't the moon gets attracted towards it and revolve around the sun ? |
my goal in this video and the next video is to start giving a sense of the scale of the earth and the solar system . and as we see , as we start getting into to the galaxy and the universe , it just becomes almost impossible to imagine . but we 'll at least give our best shot . so i think most of us watching this video... | and just to get a sense of what 4,000 is -- actually , since i have the calculator out , let 's do the exact calculation . it 's 109 times the circumference of the earth times 40 hours . that 's what it would take to do the circumference of the earth . | when sal says the sun is 109 times the circumference , is he counting the corona or not ? |
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