David Butler, you rock! I find your calm descriptions of these cosmic things calming and meditative, as well as elucidating. You are a true educator! Thank you very much for your efforts!
Funny, I have to watch it at 2X speed to keep from getting annoyed waiting and waiting for the next idea. I feel as if the story is deliberately s l o o o o o w to be able to fit more adverts.... put down the qualudes, have a triple espresso with a side of amphetamine, wash it all down with a Jolt cola and pick up the pace! PBS Space Time goes fast, that is why we have a pause button.
The light takes that long to get here in our terms but to a photon it's instant as time stops at the speed of light relative to us. So many crazy things to get your head round, I love it and hate it at the same time.
Awesome video, as always. No other presentation conveys the sense of wonder and unimaginable distances and size of the universe. (And the music is perfect too) Thanks for posting!
Thank you VERY MUCH for this series of lectures. I'm not an astronomer - not even very interested in such thngs - but you've given me a MAJOR insight on the subject and instilled me with the HUNGER FOR MORE. My 8 y.o. daughter, which loves hearing about black holes, was thrilled by some of your images (as was I too!). Thanks, again.
This may seem strange to some people, but the vastness of the universe, and my seeming insignificance is actually empowering. If all of it "doesn't matter so much", then what's holding me back? who cares? go for things with no fear, no regret. Did anyone else get sort of the same thought after seeing superclusters become a dot?
From the first time I saw it, I've been amazed at how much the large-scale structure revealed by the Sloan survey resembles a neural network. The processes involved in their formation are obviously vastly different, but I can't help but wonder if this is perhaps indicative of something fundamental about the way complexity forms at all scales.
Self similarity can be seen everywhere. Take The mind and a lightning storm in a hurricane, we observe the calm of consciousness, in the "eye of the storm" while torrents of chaos and electrochemistry surround it. The emergent properties of existence. What it all emerges *from*. We shall all maybe know, someday.
There are estimated to be 1,000,000,000,000,000,000,000,000 planets in our observable Universe. Add in a possible multiverse with zillions and billions and trillions more planets, I’m afraid that makes us pretty insignificant. I’m totally cool with that, it’s still wonderful.
I want to thank you for your videos good sir. You must be the most patient man to amass all of this data and presented as such. But most impressively, put up with this comment section :)
Unlike poor Chris below I find your voice soothing, your presentations incredibly interesting and your obvious knowledge on the subjects impressive. For every Chris out there hearing "meth mouth" (?) there's at least a hundred of me.
With all the money spent on War/politics, if we'd put ALL that money and time in to space exploration, imagine what we could see now, what new technologies for space exploration would be around.
I enjoyed this series. I learnt a lot of interesting precise details, and it was never too difficult . Thank you, sir, and your voice and the classical music were a real soothing pleasure.
Oh my, you did manage to correct IC1101. I saw that mistake in another video just recently. Wonder how that started but one gets to see who is watching who. I didn't think this series could get any better but the newer version and the optics on my new computer are breathtaking. Thank you, David.
Far away = long ago. When we look at a distant galaxy, we aren't seeing it as it is 'now' but as it was when the light our instruments detect was emitted. So the Hubble ultra deep field proves that those galaxies in it were already billions of light years away from the space we now occupy at the time their light we see now was emitted.
Fantastic. These video's are Encyclopeadic for the wealth of information contained within them. Thank you Sir for taking the effort and time to produce them in such high-quality. I eagerly await the launch and deployment of the JWST in 2018!
What an excellent series. I thank you so much David Butler. The only subject I wish had received a good deal more attention was the Oort Cloud -- if you decide to do one more main video. :-)
David Butler Wonderful. I'm subscribed and will watch for it. Your presentations are excellent. BTW, if you haven't discovered her yet, Professor Carolin Crawford of Gresham College has a whole series of simply outstanding lectures I'm sure you would appreciate. Search her name on TH-cam.
Space is unbelievably big. The distance to our sun is almost 100 million miles and the solar system extends over 120 times that length and that's conservative. You then have the hypothetical oort cloud. And that's just the solar system. The nearest star, A Centauri, is 40 trillion miles away (roughly), and there are around 300 billion stars in the milky way. And this is one galaxy. There are at least 100 billion more. What is life.
Your videos are truly excellent. I really enjoy them and learn some interesting things to boot. Thank you for making them. This is my favorite vid so far. I only wish there was a way to represent the observable universe in such a way as to truly grasp the dimensions of it all. Distances in millions of light years sound big, but how do you picture something like that in a frame of reference that really means something. Pictures of skyscrapers compared to each other are easy to grasp the scale of the objects. But that last rotating simulation of the universe.. how can anyone truly grasp that kind of scale, when there is literally nothing you could compare it to at that size? I love thinking about it though, and love these videos!
A lovely ending quote from Edwin Hubble. But personally, I prefer the deeply profound poetry of Douglas Adams.: *_"Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space."_*
_Pip pip, tallyho and mind the tweed suit!!_ Yes, tales of his obsession with all things English (Anglophelia?? Anglomania?? LOL) are legendary. Clearly a man who believed an accident of birth placed him in the wrong culture and country.
it's really simple.. The universe is expanding because the Dev's have to expand the Render Distance to avoid Server lag/ overload. or possibly, someone found an rng exploit and that's the only way to patch it ; )
im not the first to suggest that over a very long distance, space time being curved, not sure that curve is linear but if so, as we look back in time farther and farther out, this may mean we are actually viewing a part of the universe close to our local group as it was earlier in time. Light is at all points all at once. if you were to travel at the speed of time, time stops for you but to an observer goes by as his pace. but this is not what we see as an observer for light. hard to make sense when 2 different realities exist.
As space is expanding, more space is getting created to fill in there- such that the density (technically, vacuum energy density) of space always remains same. Going by conservation laws, even space itself is a manifestation of some thing (a form of energy or field), not same as 'nothing'. Vacuum is only a false vacuum (a local minima only). But globally, it could degenerate into further lower energy state.
I also wonder, if the Hubble Ultra Deep field image, was taken over 11 days, what would be seen if you aimed it at a region for 20 or even 30+ days! Also, imagine the trajectory line of the Hubble telescope was the same trajectory as an alien ship going towards or away from us, what if anything we would see!?!? An exo-galactic cruise ship, like in The Fifth Element, maybe coming here to observe though strange, noise-making primates! :D ""Aah Glip-Glop darling look, those furless monkeys have made a crude telescope-like device to look at us! Maybe we can teach them basic space-sign language; will have to basic though, they only have 5 digits on their only 2 arms!!""
the size of the galaxy is 2 million light years across, just take a minute to think about the absurd size of that, and yet we cant see it without powerful telescopes
There is a small piece of music that's sounds like "All By Myself" 6:16- 6:44 being a musician I instantly was drawn to the choice of notes that belongs to the song. I always liked that song.
Unfortunately, I cant seem to find a map of all the nearby filaments beyond our local superclusters. I only found maps of the superclusters in our local superclusters and the clusters in the Virgo Supercluster, and not the filaments in our universe! Was really hoping to find a labelled observable universe map. As far as I know, there are only three filaments in the universe: Pisces cetus, Sloan great wall, and Hercules-Corona borealis great wall. Please let me know if you found any maps. Thanks again.
Love your channel, thanks for your mind-blowing contributions. A couple of silly questions though: gravity is a strange beast, it seems to be doing work without consuming or requiring energy. No matter seems to be converted into energy when our sun attracts the planets.. unless it's part of the fusion process, but in that case, what is attracting me to the Earth's crust? What goes on in the nucleus? Does that mean that once the nucleus is no longer active, Earth's gravity will disappear? We have never seen a system where gravity does not exist because the system itself "ran out of fuel" to attract stuff around it so to speak. Nowadays we have many many stars and galaxies to look at but nobody ever found anything of the sort. I may be missing something as far as General Relativity is concerned but all these attractive or repulsive forces should be accounted for energetically... conservation of energy should be one of the universal laws. Plus gravity seems to be going in the opposite direction with respect to the laws of thermodynamics naturally favoring order to disorder. Sorry for the stupid question but I could not wrap my mind around it.
I have not read every comment so I apologise if this is a repeat question. Is "El Gordo" named for L.Gordon Cooper? If so, I'm sure he would have been very pleased 😊
So, when we say it is x light years away, is that where the light currently appears to be or is it where the object is suspected to be at this time, considering movement and space expansion?
Because the future, by definition, has not happened yet. We can only project the future in our minds, based on the knowledge of past events. Human beings are fairly proficient at spotting patterns and this is what we falsely use to predict the future- and we are almost always wrong.
Why do people comment here about the mistakes on the video? You can just send an email to mr. Butler. If you can't do half of what he did with this videos, do not publicly criticize. The whole series is really amazing, but for for thinking out what the cosmic web is I'm speechless.
I'm trying to wrap my mind around something here, maybe you can help. Say we lived in one these Galaxies that are as far out as we can see, so the so-called "old" galaxies from just after the big bang. And we had a hubble telescope and we're looking back at the Milky Way, and the other galaxies of our local group. What would we be observing and saying? Would we say that we are looking at much newer Galaxy clusters? Considering its maybe 12 billion light years between our two galaxies, would we not also assume we are looking at very old galaxies as well? Sorry if this is a very amateur question, but I'm still trying to learn:)
David could you elaborate on what you say at 17.20 on the conservation of energy laws please? From my (extremely limited) understanding, the expanding universe is consistent with the entropy law. I've never studied physics formally & would love a clearer explanation here. Thanks, Ross. Also, great videos, really loving them. Will share with all my friends.
I'm glad you like the channel. On the conservation of energy question, I think it is just about the fact the the light looses energy as it passes through the expanding space.
I see, so it goes against the 1st law. I've been reading up on the Great Attractor. Do you know much about it? I watched a video with Somak Raychaudhury (who did his PhD on it) - seemed to reckon it doesn't exist. Fascinating science though
+Xi Zhang Yes, and it was everywhere. If you think of the surface of the expanding balloon, you'll note that its expansion doesn't have a point of origin on the surface itself. Picturing the 4D space-time equivalent isn't easy to do, but the idea holds up - I think.
Where did you ever get the impression that I even wanted to build a time machine? The physics don't work so I gave up. Speeds greater than light work out to give imaginary properties, no negative time progression.
it sounded as though you were working on something spectacular Dan.. I was hoping to get ahead of you on building the proper flux capacitance to allow enough ac current to ground of the device being propelled along the space time curve. you see, i have been working on this problem for the last 22 years and i think with nanotechnology we here at The Lab, have come very close to finding a conductor with absolute zero resistance as you see, there cant be any, if there is the 220 gigawatts needed to envelope the transport vehicle cannot be properly distributed from our flux array. good day
Dr. Buttler, my hobby is astronomy, i want to keep all the videos in series how can i get it? some of videos you have uploaded are not opening. how can i get all?
The vastness of the universe may have so many contraversional movements. It could be transpiring forward, backwards, twisting, turning in time, alternating the past or blasting the future beyond beliefs. That what's so amazing about our omniverse realms, a multitude of universes. Can you just imagine? 🤔💀😱
It is available on line. The link under the video takes you to the page with all the texts. For this particular one, the link is howfarawayisit.com/wp-content/uploads/2013/05/The-Cosmos.pdf Let me know if you cannot get to it. I would like to know the message you get when you try. Thanks.
How do we know that the galaxy or universe is expanding by using the red shift?Like,how can we tell it's moving away from us or coming to us cos we don't have millions of years to compare.Just say there are two cars (with no taillights)or trains,both are 1000km away but one is coming towards us and the other away from us.I'm thinking if they were galaxies then you couldn't tell which one's moving away and which one's coming and we're just seeing it like that for moment.Anyone knows?
The key to understanding how we know how far away things are is what the video book is all about. We develop what we call the distance ladder from triangulation on the earth, to parallax in the solar system, to parallax to nearby stars. For distant stars, we use the HR-diagram. This takes us to distances that include stars that act as standard candles. These give us distances to enough galaxies to measure distance vs red-shift. If you liked this segment of the "How far away is it" video book, I think you would enjoy starting with the Earth and working back to the Cosmos. If you do this, I would like to hear from you again to see if I was able to help you understand just how we got to using red-shift the way we do.
+David Butler I still don't understand how redshift brings out acceleration rather than constant velocity over long time. Great videos doc but this is a thing that makes me wonder. Besides if we are being pulled by great attractor doesn't that mean all the galaxies being closer to their attractors go faster than the ones that are further. Would that explain red shift instead of space expansion?
OverlonGamer Take a look at my new four segment video book on relativity "How fast is it". I cover redshift in the last segment. Then ask me your question again. Thanks.
Hi, I have a few questions about the UNIVERSE. I know we have discovered large scale structures, but have we catalogued any superclusters inside them or clusters inside those? This means any area outside of 1 billion light years. Can two large scale structures (filaments, walls, etc) be gravitationally attracted or will they all disperse? Can two superclusters collide? Since most of the first stars died quickly in supernova, can we see any of these first supernova with a really powerful telescope? Is it even possible to see the first stars before the first galaxies?
+Jatatan Globustead It has always been difficult to identify the boundaries between Superclusters. Take a look at my 2015 update. I go into more depth about this and include a new way of identifying Superclusters with our local supercluster being redefined and named Laniakea.
If I had a chance I would have been astronomer. I love these videos. All of them. Thank you Sir. You have no idea how much they mean to us.
i can't wait for the firts images of the james webb space telescope
one of the things to look forward to that keeps my life going
Yes, it has all function right first
I wanna be firts
@@diverguy3556 I'm starting to think I won't live to see it launch, and I'm only 37 lol.
You've been waiting and you're going to wait some more.
David Butler, you rock! I find your calm descriptions of these cosmic things calming and meditative, as well as elucidating. You are a true educator! Thank you very much for your efforts!
Funny, I have to watch it at 2X speed to keep from getting annoyed waiting and waiting for the next idea. I feel as if the story is deliberately s l o o o o o w to be able to fit more adverts.... put down the qualudes, have a triple espresso with a side of amphetamine, wash it all down with a Jolt cola and pick up the pace! PBS Space Time goes fast, that is why we have a pause button.
Brilliant Series. Fills in where TV shows miss, Thank You, David!
I honestly can’t say enough how much I love these videos.
as always, nailed it with the music. conveys a sense of awe and wonder. great content. love this channel. sometimes use it help me sleep. thank you!
Master of the Cosmos, Mr David Butler.
Brilliantly unique prensentation.
Fantastic series David. I found these recently and have been watching atleast 1 or 2 a day. Can't wait to start some of your other series!
Combinations of your voice , knowledge and background music makes your videos very interesting and glue to the screen
Thank you
Come for the info, stay for the pleasant narration and background music.
The light takes that long to get here in our terms but to a photon it's instant as time stops at the speed of light relative to us. So many crazy things to get your head round, I love it and hate it at the same time.
Awesome video, as always.
No other presentation conveys the sense of wonder and unimaginable distances and size of the universe.
(And the music is perfect too)
Thanks for posting!
This video is very relaxing, thanks man..listening to classical muskc while learning about space, I love it...thank you for putting this on TH-cam
Thank you VERY MUCH for this series of lectures. I'm not an astronomer - not even very interested in such thngs - but you've given me a MAJOR insight on the subject and instilled me with the HUNGER FOR MORE. My 8 y.o. daughter, which loves hearing about black holes, was thrilled by some of your images (as was I too!). Thanks, again.
This may seem strange to some people, but the vastness of the universe, and my seeming insignificance is actually empowering. If all of it "doesn't matter so much", then what's holding me back? who cares? go for things with no fear, no regret.
Did anyone else get sort of the same thought after seeing superclusters become a dot?
That way of thinking is my therapy.
perspective helps solve a lot. Some may say in cliche fashion, that it's everything.
Well said
If you could see the entirety of my logo here you could read:
No lives matter: the universe doesn't give a fuck about you !
You have the most beautiful galactic voice of the Universe Mr Butler ! 👍 Cheers 🥂
Thanks for sharing all this information.
From the first time I saw it, I've been amazed at how much the large-scale structure revealed by the Sloan survey resembles a neural network. The processes involved in their formation are obviously vastly different, but I can't help but wonder if this is perhaps indicative of something fundamental about the way complexity forms at all scales.
Self similarity can be seen everywhere. Take The mind and a lightning storm in a hurricane, we observe the calm of consciousness, in the "eye of the storm" while torrents of chaos and electrochemistry surround it.
The emergent properties of existence. What it all emerges *from*. We shall all maybe know, someday.
Thank you! The numbers that you quoted for the numbers boggles the mind making it too hard to imagine!
always good to remind yourself about how insignificant you really are in the universe
we are not insignificant, we are precisious and valueble
There are estimated to be 1,000,000,000,000,000,000,000,000 planets in our observable Universe. Add in a possible multiverse with zillions and billions and trillions more planets, I’m afraid that makes us pretty insignificant. I’m totally cool with that, it’s still wonderful.
But isn't that the beauty of it? At least from our perspective in significance.. we are the most relevant, and irrelevant existence, at the same time.
True, on the other hand, the human brain is still the most complex thing we have ever discovered big or small.
David you are king. great instructional as usual. but nothing on your videos is usual. total awesomeness
I want to thank you for your videos good sir. You must be the most patient man to amass all of this data and presented as such. But most impressively, put up with this comment section :)
Unlike poor Chris below I find your voice soothing, your presentations incredibly interesting and your obvious knowledge on the subjects impressive. For every Chris out there hearing "meth mouth" (?) there's at least a hundred of me.
Sooooo much mannnnyyyy galaxies!!!! We are not alone for sure!
With all the money spent on War/politics, if we'd put ALL that money and time in to space exploration, imagine what we could see now, what new technologies for space exploration would be around.
Thank you for your entire body of work. I have learned much.
I enjoyed this series. I learnt a lot of interesting precise details, and it was never too difficult . Thank you, sir, and your voice and the classical music were a real soothing pleasure.
All I can say is thanks for this video, thanks for your channel and thanks for existing.
Thank the universe. Free will does not exist.
Wow, wow wow!! This may very well be one of the greatest videos in all of youtube!! Thank you so much!
I'm so pleased......almost 100,000 views & I first found this series when viewers were only in the teens. Gets better because he edits in new info
David, Thank you. OUTSTANDING JOB, I have always enjoyed this subject but you made it easy to understand and enormously interesting. NO, SUPER JOB!
Sir I commend you for such awesome and highly enlightening videos...
It sort of put my problems into perspective humility
Wonders of the universe.
What is an amazing lesson.
Oh my, you did manage to correct IC1101. I saw that mistake in another video just recently. Wonder how that started but one gets to see who is watching who. I didn't think this series could get any better but the newer version and the optics on my new computer are breathtaking. Thank you, David.
Another Fascinating Video. 🇺🇸🇮🇹
Our Humanity will be so thankful for your incredible work..thank you db..
Far away = long ago. When we look at a distant galaxy, we aren't seeing it as it is 'now' but as it was when the light our instruments detect was emitted. So the Hubble ultra deep field proves that those galaxies in it were already billions of light years away from the space we now occupy at the time their light we see now was emitted.
Simply beautiful.
the voice & the sound are soothing
Fantastic. These video's are Encyclopeadic for the wealth of information contained within them. Thank you Sir for taking the effort and time to produce them in such high-quality.
I eagerly await the launch and deployment of the JWST in 2018!
This is wonderful! I just watched Liberty University's series on the creation and age of the visible universe and I must say this is much better.
What an excellent series. I thank you so much David Butler.
The only subject I wish had received a good deal more attention was the Oort Cloud -- if you decide to do one more main video. :-)
I need to do one that includes comets and the Oort Cloud.
David Butler Wonderful. I'm subscribed and will watch for it. Your presentations are excellent. BTW, if you haven't discovered her yet, Professor Carolin Crawford of Gresham College has a whole series of simply outstanding lectures I'm sure you would appreciate. Search her name on TH-cam.
Dr. Butler the cosmos video was not working I downloaded it and kept it, it's working now. Thanks
I enjoyed all your videos
Space is unbelievably big. The distance to our sun is almost 100 million miles and the solar system extends over 120 times that length and that's conservative. You then have the hypothetical oort cloud. And that's just the solar system. The nearest star, A Centauri, is 40 trillion miles away (roughly), and there are around 300 billion stars in the milky way. And this is one galaxy. There are at least 100 billion more. What is life.
James Brewer 150 million km
Even I'm not a student but your videos are very informative and interesting.
Thanks.
I've watched this over a dozen times.
Me too.
Same
Your videos are truly excellent. I really enjoy them and learn some interesting things to boot. Thank you for making them. This is my favorite vid so far. I only wish there was a way to represent the observable universe in such a way as to truly grasp the dimensions of it all. Distances in millions of light years sound big, but how do you picture something like that in a frame of reference that really means something. Pictures of skyscrapers compared to each other are easy to grasp the scale of the objects. But that last rotating simulation of the universe.. how can anyone truly grasp that kind of scale, when there is literally nothing you could compare it to at that size?
I love thinking about it though, and love these videos!
Well written and narrated with good graphics!
A lovely ending quote from Edwin Hubble. But personally, I prefer the deeply profound poetry of Douglas Adams.:
*_"Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space."_*
_Pip pip, tallyho and mind the tweed suit!!_ Yes, tales of his obsession with all things English (Anglophelia?? Anglomania?? LOL) are legendary.
Clearly a man who believed an accident of birth placed him in the wrong culture and country.
This is so enriching.
it's really simple.. The universe is expanding because the Dev's have to expand the Render Distance to avoid Server lag/ overload. or possibly, someone found an rng exploit and that's the only way to patch it ; )
Very nice series. Loved it
This segment 05:50 to 07:30 just blew my mind entirely.
David it saddens me that you are as small as you are. It would brighten my day up if you all of the sudden become huge on youtube.
David Butler - Master of the Cosmos
im not the first to suggest that over a very long distance, space time being curved, not sure that curve is linear but if so, as we look back in time farther and farther out, this may mean we are actually viewing a part of the universe close to our local group as it was earlier in time. Light is at all points all at once. if you were to travel at the speed of time, time stops for you but to an observer goes by as his pace. but this is not what we see as an observer for light. hard to make sense when 2 different realities exist.
Haha I'll never understand why he doesn't have millions of views
Look at the trending tab. There's your answer.
The Hubble ultra deep field image is to me one of the most inspiring pieces of scientific data!
Love this.
13:30 I think that this is one of the greatest animations humanity made to visualize the mind boggling dimension of the universe.
If space is expanding, isn't the space we are occupying expanding also?
Since we're inside of it we would not be able to notice it.
Space is expanding but matter is still held together by gravity
As space is expanding, more space is getting created to fill in there- such that the density (technically, vacuum energy density) of space always remains same.
Going by conservation laws, even space itself is a manifestation of some thing (a form of energy or field), not same as 'nothing'. Vacuum is only a false vacuum (a local minima only). But globally, it could degenerate into further lower energy state.
I also wonder, if the Hubble Ultra Deep field image, was taken over 11 days, what would be seen if you aimed it at a region for 20 or even 30+ days!
Also, imagine the trajectory line of the Hubble telescope was the same trajectory as an alien ship going towards or away from us, what if anything we would see!?!? An exo-galactic cruise ship, like in The Fifth Element, maybe coming here to observe though strange, noise-making primates! :D
""Aah Glip-Glop darling look, those furless monkeys have made a crude telescope-like device to look at us! Maybe we can teach them basic space-sign language; will have to basic though, they only have 5 digits on their only 2 arms!!""
the size of the galaxy is 2 million light years across, just take a minute to think about the absurd size of that, and yet we cant see it without powerful telescopes
6 mn Lyr across
That's it! My mind cannot absorb any more of the cosmos. I need to go back to a simpler subject, like politics. Oh wait....
Intriguing and frightening
Excellent!
There is a small piece of music that's sounds like "All By Myself" 6:16- 6:44 being a musician I instantly was drawn to the choice of notes that belongs to the song. I always liked that song.
Sergei Rachmaninov. Piano concert N°3 I think.
Gitana Maldita 2nd concerto, 2nd movement
@@scarbo1989 is that the music I hear? I'll have to broaden my classical music studies. Thank you.
@@scarbo1989 Yes that's it! I have it in cassette (yet) 😄
th-cam.com/video/yJpJ8REjvqo/w-d-xo.html
Fascinating as always.
Nice piano concerto from mozart
I think I became a philosopher..
Unfortunately, I cant seem to find a map of all the nearby filaments beyond our local superclusters. I only found maps of the superclusters in our local superclusters and the clusters in the Virgo Supercluster, and not the filaments in our universe! Was really hoping to find a labelled observable universe map. As far as I know, there are only three filaments in the universe: Pisces cetus, Sloan great wall, and Hercules-Corona borealis great wall. Please let me know if you found any maps. Thanks again.
I love your videos.
Love your channel, thanks for your mind-blowing contributions. A couple of silly questions though: gravity is a strange beast, it seems to be doing work without consuming or requiring energy. No matter seems to be converted into energy when our sun attracts the planets.. unless it's part of the fusion process, but in that case, what is attracting me to the Earth's crust? What goes on in the nucleus? Does that mean that once the nucleus is no longer active, Earth's gravity will disappear? We have never seen a system where gravity does not exist because the system itself "ran out of fuel" to attract stuff around it so to speak. Nowadays we have many many stars and galaxies to look at but nobody ever found anything of the sort. I may be missing something as far as General Relativity is concerned but all these attractive or repulsive forces should be accounted for energetically... conservation of energy should be one of the universal laws. Plus gravity seems to be going in the opposite direction with respect to the laws of thermodynamics naturally favoring order to disorder. Sorry for the stupid question but I could not wrap my mind around it.
Edoardo, Take a look at my 2 videos on relativity (special and general). Then let me know what you think. Thanks. David
A galaxy that's six million light years across?? Holy shit.
Huge
I have not read every comment so I apologise if this is a repeat question. Is "El Gordo" named for L.Gordon Cooper? If so, I'm sure he would have been very pleased 😊
No. It was the size.
El Gordo is Spanish for The Fat Man
So, when we say it is x light years away, is that where the light currently appears to be or is it where the object is suspected to be at this time, considering movement and space expansion?
It is simply the distance the light traveled to get to us.
Thank you!
Seems the more we learn the less we know
so IC 1011 might be gone now? or vastly different? a billion years of change!
How does one determine which direction in time one is looking?
Can we not look forward any at all?
we can't see into the future. we can only see into the past.
Because the future, by definition, has not happened yet. We can only project the future in our minds, based on the knowledge of past events. Human beings are fairly proficient at spotting patterns and this is what we falsely use to predict the future- and we are almost always wrong.
Great post!!
How many estimated no of galaxies are there in the entire observable universe?
Why do people comment here about the mistakes on the video? You can just send an email to mr. Butler. If you can't do half of what he did with this videos, do not publicly criticize.
The whole series is really amazing, but for for thinking out what the cosmic web is I'm speechless.
+lcsrap~ Thanks for your comments. But I must say that I prefer that errors be made public so everyone gets the correct info.
I'm trying to wrap my mind around something here, maybe you can help. Say we lived in one these Galaxies that are as far out as we can see, so the so-called "old" galaxies from just after the big bang. And we had a hubble telescope and we're looking back at the Milky Way, and the other galaxies of our local group. What would we be observing and saying? Would we say that we are looking at much newer Galaxy clusters? Considering its maybe 12 billion light years between our two galaxies, would we not also assume we are looking at very old galaxies as well? Sorry if this is a very amateur question, but I'm still trying to learn:)
+adameater Good question. We would see the early dwarf galaxies that came together to form our local group over the past 12 billion years.
Could the power from the movie Jumper apply to these images?
David could you elaborate on what you say at 17.20 on the conservation of energy laws please? From my (extremely limited) understanding, the expanding universe is consistent with the entropy law. I've never studied physics formally & would love a clearer explanation here. Thanks, Ross.
Also, great videos, really loving them. Will share with all my friends.
I'm glad you like the channel. On the conservation of energy question, I think it is just about the fact the the light looses energy as it passes through the expanding space.
I see, so it goes against the 1st law. I've been reading up on the Great Attractor. Do you know much about it? I watched a video with Somak Raychaudhury (who did his PhD on it) - seemed to reckon it doesn't exist. Fascinating science though
joetavish I don't have any additional insights into the Great Attractor. The Next Gen telescope might help us know more, but that's a few years away.
Amazing stuff … thanks for putting this together for us … have a nice day … !
Thank you Sir. if we measure the movement and speed of all the visible objects in cosmos, can we find the location of the big bang?
+Xi Zhang Yes, and it was everywhere. If you think of the surface of the expanding balloon, you'll note that its expansion doesn't have a point of origin on the surface itself. Picturing the 4D space-time equivalent isn't easy to do, but the idea holds up - I think.
Thank you very much
I like your videos. they are extremely helpful. Crash Course should get you to do something with them.
now you can finish your time machine dan
What the - who are you?
+Dan Trivates why I'm nodded freak Dan, who are you? I'm building a time machine too but I'm farther along.
Where did you ever get the impression that I even wanted to build a time machine? The physics don't work so I gave up. Speeds greater than light work out to give imaginary properties, no negative time progression.
it sounded as though you were working on something spectacular Dan.. I was hoping to get ahead of you on building the proper flux capacitance to allow enough ac current to ground of the device being propelled along the space time curve. you see, i have been working on this problem for the last 22 years and i think with nanotechnology we here at The Lab, have come very close to finding a conductor with absolute zero resistance as you see, there cant be any, if there is the 220 gigawatts needed to envelope the transport vehicle cannot be properly distributed from our flux array. good day
By the way, your voice is perfect 👍👍👍👍
“Joe Pera talks to you about space”
The WONDERFUL UNIVERSE
Thanks dr.Butler i have learned too much from you and i wanna say that the quran said that the universe age is 13.7 billion years too from 1400 years
The grandest structure of filaments and clumps seem very much like neuron cells in the brain with their nerve inter connections.
Dr. Buttler, my hobby is astronomy, i want to keep all the videos in series how can i get it? some of videos you have uploaded are not opening. how can i get all?
All my videos should show in all countries. What is it that you can't open and watch?
If the universe is expanding in our 3 spatial dimensions and moving forward in one time dimension, could it be shrinking in another dimension?
The vastness of the universe may have so many contraversional movements. It could be transpiring forward, backwards, twisting, turning in time, alternating the past or blasting the future beyond beliefs. That what's so amazing about our omniverse realms, a multitude of universes. Can you just imagine? 🤔💀😱
It's a rhetorical question because we will never know.
Sir!
Namaste
Text of which is not available on. Net. Kindly verify & enable
It is available on line. The link under the video takes you to the page with all the texts. For this particular one, the link is
howfarawayisit.com/wp-content/uploads/2013/05/The-Cosmos.pdf
Let me know if you cannot get to it. I would like to know the message you get when you try. Thanks.
How do we know that the galaxy or universe is expanding by using the red shift?Like,how can we tell it's moving away from us or coming to us cos we don't have millions of years to compare.Just say there are two cars (with no taillights)or trains,both are 1000km away but one is coming towards us and the other away from us.I'm thinking if they were galaxies then you couldn't tell which one's moving away and which one's coming and we're just seeing it like that for moment.Anyone knows?
The key to understanding how we know how far away things are is what the video book is all about. We develop what we call the distance ladder from triangulation on the earth, to parallax in the solar system, to parallax to nearby stars. For distant stars, we use the HR-diagram. This takes us to distances that include stars that act as standard candles. These give us distances to enough galaxies to measure distance vs red-shift. If you liked this segment of the "How far away is it" video book, I think you would enjoy starting with the Earth and working back to the Cosmos. If you do this, I would like to hear from you again to see if I was able to help you understand just how we got to using red-shift the way we do.
David Butler Thankyou.
+David Butler I still don't understand how redshift brings out acceleration rather than constant velocity over long time. Great videos doc but this is a thing that makes me wonder. Besides if we are being pulled by great attractor doesn't that mean all the galaxies being closer to their attractors go faster than the ones that are further. Would that explain red shift instead of space expansion?
OverlonGamer Take a look at my new four segment video book on relativity "How fast is it". I cover redshift in the last segment. Then ask me your question again. Thanks.
Hi, I have a few questions about the UNIVERSE. I know we have discovered large scale structures, but have we catalogued any superclusters inside them or clusters inside those? This means any area outside of 1 billion light years. Can two large scale structures (filaments, walls, etc) be gravitationally attracted or will they all disperse? Can two superclusters collide? Since most of the first stars died quickly in supernova, can we see any of these first supernova with a really powerful telescope? Is it even possible to see the first stars before the first galaxies?
+Jatatan Globustead It has always been difficult to identify the boundaries between Superclusters. Take a look at my 2015 update. I go into more depth about this and include a new way of identifying Superclusters with our local supercluster being redefined and named Laniakea.
+David Butler Thanks again for the reply