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right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if so , if the universe is expanding , and the distance between things are getting larger , should n't we expect that in a smaller scale , let 's say our own solar system , to be the exact same siuation ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | do we see that expansion in space in solar system ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if the universe is constantly expanding , how is it possible to estimate the radius ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | what i 'm getting at , is if we moved our location in the universe closest to the outer part , would we be observing the other side of the universe in our `` observable universe '' ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | this coordinate was much closer to that . where we are in the universe right now was much closer to that point in the universe . the other thing to think about is as this -- let me actually draw it . | if the universe started from a singular point then how can the light exist in it ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | what forces the universe to expand ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | this coordinate , where we 're sitting today at the present time , is now all the way over here . that coordinate where the photon was originally emitted is now going to be sitting right over here . and that photon , it said , ok , after 10 million light years , i 'm going to get over there . and i 'm approximating . | so wo n't it take that photon longer to get to that distance because however fast its going we have to subtract the exspansion rate of the universe from it ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and frankly , if that person , that person , if there is a civilization there right now and if they 're sitting right there , and they 're observing photons being emitted from our coordinate , from our point in space right now , they 're not going to see us . they 're going to see us 13.4 billion years ago . they 're g... | if a photon from an object was sent from the it 13.7 years ago , when we were much closer to it , at what distance from us will we see it , the distance he was from us when the photon started travelling ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | did sal mean that the universe is expanding faster than the speed of light , which is three times ten to the eighth power metres per second ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | it is like , wow , i was able to cover 20 million light years in only 10 million years . it looks like i 'm moving faster than the speed of light . the reality is it 's not because the space coordinates themselves are spreading out . | how can the universe ever expand faster than the speed of light since nothing can go faster than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . that 's our only way of kind with light to kind of think about the distance . | hypothetically , if we travel faster than light and go backwards in time , will the history of earth we observe will be the same that really occurred ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | is there an estimate in how far the universe expands ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | how did we find out that the universe is approximately 13.7 billion years old specifically ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | what method do we use to find out the approximate age of the universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . | does n't that mean that the photon travel for 46 billion light years ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . | so has the speed of light gradually increased with the stretching of the universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | so is the big bang the start of the entire universe or the start of just the observable universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . you could imagine it 's kind of a trampoline or the surface of a balloon . | if space is expanding in volume , are the things in space also expanding in volume , or are objects like the earth independent from the fabric of space-time ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if i were in space and i took a exact 1 meter step , would i have jumped ever so more than one meter because the universe is expanding ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . | all things , outside the observable , moving away from us faster than light can travel ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | so to calculate this 13.7 billion years the scientists had to calculate how the universe was expanding since the big bang ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and we 'll see that that was the range that it was emitting in . but it emits a photon . and that photon is traveling at the speed of light . | and how they calculate how long the photon had been travelling ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and frankly , if that person , that person , if there is a civilization there right now and if they 're sitting right there , and they 're observing photons being emitted from our coordinate , from our point in space right now , they 're not going to see us . they 're going to see us 13.4 billion years ago . they 're g... | so they would see our part of the universe 13.7 billion years ago and we would see what they were like 13.7 billion years ago ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | if one was to travel in the direction of the `` white hot plasma '' that we are observing 13.7 billion years later , would we notice the matter rapidly mature into the state that it is `` presently '' in as we approach it ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . | so a quick ques ar we considering the speed of light which is the speed at which photon is travelling to be more than rate of expansion ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | do we actually know at what rate does the universe expands ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | it is now 80 million light years . and so this photon might be getting frustrated . there 's an optimistic way of viewing it . | becaus your photon was getting further and furter behind on its trek ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | i have n't done the math to figure it out . so it 's done 30 million light years . and actually i should n't even make it the same proportion . | is it possible for two objects to be 30 million light years apart in a 300,000 years old universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | now , it is actually -- this is really just for the sake of giving you the idea of why -- well , giving you the intuition of what 's going on . this distance now is no longer 30 million light years . maybe it 's 100 million . | so , is 30 million light year distance in a 300k years universe possible ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | another thought/question : is space expanding everywhere ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | if this is true , is the rate of expansion of the universe slowing down ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | is it that the rate at which universe is expanding is comparatively lesser than the speed of light or is there an other explanation for this ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if the universe is expanding , if you send something from a different galaxy , it will never reach earth ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | now , it is actually -- this is really just for the sake of giving you the idea of why -- well , giving you the intuition of what 's going on . this distance now is no longer 30 million light years . maybe it 's 100 million . | can anyone explain how the distance of 2 points in space can be 30 million lightyears whereas the the universe is only about 300 thousand years old ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | was the universe expanding faster than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . that 's our only way of kind with light to kind of think about the distance ... | if this `` light beam '' has traveled from a point 13.7 billion light years away , but the distance it 's covered is much larger , and it 's reached us , is light traveling faster then space is expanding ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but the distance that it actually traversed in 10 million years is more than 10 million light years . it 's 20 million light years . so you ca n't just multiply a rate times time on these cosmological scales , especially when the coordinates themselves , the distance coordinates are actually moving away from each other... | and , by that logic did the light only travel the original 300 million light years ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | if we were talking about smaller time scales or i guess smaller distances , you could say approximately that . the expansion of the universe itself would not make as much of a difference . and let me make it even more clear . | if the distance between objects increases , but so does your `` ruler '' what difference does it make ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . and when we see light coming from these remote objects -- that light is getting to us right here . this is where we are . | what is the light ( photon ) what will happen when it reaches us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . and when we see light coming from these remote objects -- that light is getting to us right here . this is where we are . | if we can only see things that are close enough for its light to reach us , does it mean as time goes on our observable universe is growing larger ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | this coordinate , where we 're sitting today at the present time , is now all the way over here . that coordinate where the photon was originally emitted is now going to be sitting right over here . and that photon , it said , ok , after 10 million light years , i 'm going to get over there . | so i guess we can determine how far a photon has travelled , right ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | where we are in the universe right now was much closer to that point in the universe . the other thing to think about is as this -- let me actually draw it . so let 's go 300,000 years after that initial expansion of that singularity . | what is the farthest/oldest thing we 've seen ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and frankly , if that person , that person , if there is a civilization there right now and if they 're sitting right there , and they 're observing photons being emitted from our coordinate , from our point in space right now , they 're not going to see us . they 're going to see us 13.4 billion years ago . they 're g... | q if we could get to that star within 1 solar year ( imagine ) could we look at the earth and see what was going on here as it was happening 6 bil years ago ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so the photon is just moving at the speed of light . but the distance that it actually traversed in 10 million years is more than 10 million light years . it 's 20 million light years . so you ca n't just multiply a rate times time on these cosmological scales , especially when the coordinates themselves , the distance... | how has the matter at the edge of the universe traveled 45m light years in just 300k years ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | is n't the rate at which the universe is expanding actually slowing down , and wo n't the universe eventually begin to contract ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when this occurred is 13.7 billion years ago . and even though we 're used to dealing with numbers in the billions , especially when we talk about large amounts of money an... | if the `` photon '' started it 's journey 13.7 b years ago , was n't it in about the same place as the current observer is now , since it would have occurred at about the same time as the big bang ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and the space that it has left to traverse is no longer only 20 million light years . it might now be 80 million light years . it is now 80 million light years . | if the surface of the universe is curved , the path traveled by the light would be circular rather than a straight line , so the actual distance travelled might in fact be infinite ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and there 's a couple of reasons to think about it . first of all , think about it , that light was emitted 13.7 billion years ago . when that light was emitted , we were much closer to that coordinate . | if the distance between an observer on earth and the first photon that was emitted 13.7 billions years ago keeps increasing , does that mean that we will never be able to see how the universe looked like in the beginning ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . | is n't it impossible for the big bang to actually be an explosion because there was no space for the explosion to be contained in ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and the math is n't exact here . i have n't done the math to figure it out . so it 's done 30 million light years . | what math is used to figure out the new distances/lengths traversed ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . and when we see light coming from these remote objects -- that light is getting to us right here . this is where we are . | does the expansion of the universe , mainly the increasing distance between objects , out pace the speed that light can travel ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | how can that be possible if the universe has been around for only about 13.7 billion years ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | at what rate is the universe expanding ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but the light from that remote object is just now getting to us . and that light took 13.7 billion years to get to us . now , what i 'm going to hesitate to do , because we 're talking over such large distances and we 're talking on such large time scales and time scales over which space itself is expanding -- we 're g... | if the light took 13.7 billion years to get to us would n't we see the big bang ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so that coordinate , where the photon roughly gets in 10 million light years , is about right over here . the whole universe has expanded . all the coordinates have gotten further away from each other . | how would we measure the radius of the whole universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | because we can observe an equal distance . if things are n't really strange , we can observe an equal distance in any direction . so actually maybe we should put us at the center . | does all matter expand in a north- south direction ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | that coordinate where the photon was originally emitted is now going to be sitting right over here . and that photon , it said , ok , after 10 million light years , i 'm going to get over there . and i 'm approximating . | will the photon ever get there ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and we 'll see that that was the range that it was emitting in . but it emits a photon . and that photon is traveling at the speed of light . | how can we find out the age of a photon ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | there 's an optimistic way of viewing it . it is like , wow , i was able to cover 20 million light years in only 10 million years . it looks like i 'm moving faster than the speed of light . | sal states that `` photon says wow i was able to travel 20 million light years in only 10 million years '' does that mean the photon traveled with the speed grater than speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | at what rate the universe is expanding is it more than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . | if 13.7 billion years ago we were closer to the object emitting the light 5 , the universe was expanding and we were pushed away , does that mean since the light was chasing us the entire way , that the universe has slowed its expansion enough for the light to catch up with us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so you ca n't just multiply a rate times time on these cosmological scales , especially when the coordinates themselves , the distance coordinates are actually moving away from each other . but i think you see , or maybe you might see , where this is going . ok , this photon says , oh , in another -- let me write this ... | if we can develop a ultra-advanced telescope to see farther than the farthest located quasar , wont'w be able to see the beginning of time , or the big bang itself ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | it is now 80 million light years . and so this photon might be getting frustrated . there 's an optimistic way of viewing it . | if the space between the photon and us keeps on getting stretched would the photon actually ever reach us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | maybe now , it 's on the order of -- i do n't know -- maybe it 's a billion light years . maybe now it 's a billion light years . and maybe this distance over here -- and i 'm just making up these numbers . | so , from one point of the universe to the other , the universe is 27.14 billion light years wide ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . that 's our only way of kind with light to kind of think about the distance ... | does n't that make it impossible for light that was emitted after the universe started expanding faster than the speed of light to ever reach us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and i want to make it very clear . this object is now 46 billion light years away from us . when we just use light to observe it , it looks like , just based on light years , hey , this light has been traveling 13.7 billion years to reach us . that 's our only way of kind with light to kind of think about the distance ... | if the universe were to expand at almost the speed of light than the light being talked about in this video [ 13.7 billion years old ] could be the image of the condensed form of universe at the time of big bang.so , actually how big is the universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | he is saying that as the universe expands it is creating the fabric of space and time but what was the singularity in or on if there was no fabric before the big bang ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | is there a correlation between the estimated time of the big bang 13.7 billion years and the radius of the observable universe ( about 13 billion light years ) ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the longest that that could have been traveling is 13.7 billion years . so it could be traveling 13.7 billion years . so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . | is 13.7 billion years the time the photon has taken or the distance it has travelled ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . | how do you estimate when the big bang happened ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | wait , when the universe expands , the planets and stars that were already there get farther away from each other ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . you could imagine it 's kind of a trampoline or the surface of a balloon . | i thought that the edges of space were expanding , not the already made space ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so what we 're going to see is this white-hot haze . so we 're going to see this kind of white-hot plasma , white hot , undifferentiated not differentiated into proper stable atoms , much less stars and galaxies , but white hot . we 're going to see this white-hot plasma . | what is white hot plazma ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if the universe keeps expanding how would the light from something on the edge of the universe be able to reach us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and that photon is traveling at the speed of light . it is light . and so that photon , says , you know what , i only got 30 million light years to travel . | after the big bang , did the stars immediately start making light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | how fast does the universe expand ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | maybe now , it 's on the order of -- i do n't know -- maybe it 's a billion light years . maybe now it 's a billion light years . and maybe this distance over here -- and i 'm just making up these numbers . | if the radius of the universe is estimated as 14 billion light years , where are we located in relation to its center ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . | so the universe expands at a speed lower than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | this coordinate was much closer to that . where we are in the universe right now was much closer to that point in the universe . the other thing to think about is as this -- let me actually draw it . | so how does light from a point in the universe reach our eyes ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and there 's a couple of reasons to think about it . first of all , think about it , that light was emitted 13.7 billion years ago . when that light was emitted , we were much closer to that coordinate . | if you find a light source that shows up as having been emitted 13.7 billion years ago does n't that mean that 13.7 billion years ago they occupied the same point in space because the universe started out as a singularity ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so when we looked at that depiction -- this i think was two or three videos ago , of the observable universe -- i drew , it was this circle . and when we see light coming from these remote objects -- that light is getting to us right here . this is where we are . | what if we had to propagate a very very strong laser in space , will anyone in andromeda ( assuming that there are people living in one of the planet of andromeda ) be able to see that light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and maybe this distance over here -- and i 'm just making up these numbers . in fact , that 's probably be too big for that point -- maybe this is now 100 million light years . this is now 100 million light years . | what is the big rip ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if 'everything ' in the universe is expanding , then wont the celestial bodies and planets explode because of the universe is expanding ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but let 's just think about two points in this early universe . so in this early universe , let 's say you have that point . and let 's say you have the coordinate where we are right now . | when you say `` observable universe '' , does that mean that there is more space past it ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . and so that photon , says , you know what , i only got 30 million light years to travel . | and if it does , some light would not have reached us yet , since the unobservable universe could also contain stars , so does that mean that the expansion of the universe is faster than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . | in minute 12.25 > > > but if it is n't a photon if it 's an object moves faster than speed of light and the speed of expansion will it reach ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | is everywhere in the universe expanding at the same rate ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | why is the universe expanding ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | what is the rate of expansion of universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . | where i am confused is how do you account for the gravitational influence on the proton that reaches you ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | in his example of the photon seemingly getting further away from it 's destination does n't that imply that the universe is expanding faster than the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but the distance that it reversed , maybe this distance right here is now 20 million light years because it got there . every time it moved some distance , the space that it had traversed is now stretched . so even though its traveled for 10 million years , the space that it traversed is no longer just 10 million light... | so in theory with every point in space able to reach itself by circumnavigating the universe should n't there be some sort of light source that at some point in time hits the earth from most every direction supposing it was at exactly the same distance from earth in all directions at the time of the big bang ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | i 've heard that universe 's expanding is accelerated by something called dark energy ( not confirmed , though ) , then can the universe accelerate to a speed where light , emitted by other celestial object can never reach us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | 10 million years go by . the universe has expanded . this coordinate , where we 're sitting today at the present time , is now all the way over here . | since the universe is stretching & spreading , is there a center of the universe ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | the universe is expanding . these coordinates , the space is actually spreading out . you could imagine it 's kind of a trampoline or the surface of a balloon . | is there a way to figure out the time/space between several coordinates and then plot those to get a general outline ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . | can we ever exceed the speed of light ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | and we 'll see that that was the range that it was emitting in . but it emits a photon . and that photon is traveling at the speed of light . it is light . | in the video , when sal talks about the photon of light , would n't the photon never reach us ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | so is the universe still expanding right now ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | but it emits a photon . and that photon is traveling at the speed of light . it is light . and so that photon , says , you know what , i only got 30 million light years to travel . | if the universe expanding faster than the speed of light how come we can still see the light from other celestial bodies ? |
right now , the best estimate of when the big bang occurred -- and once again , i do n't like the term that much because it kind of implies some type of explosion . but what it really is is kind of an expansion of space , when space started to really start to expand from a singularity . but our best estimate of when th... | so this is now 100 million light years away from each other . the universe is expanding . these coordinates , the space is actually spreading out . | if the universe is always expanding how do we see anything in the night sky if the photon `` stays '' in the `` same spot '' ? |
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