My only criticism here is I didn’t want this talk to end. Absolutely fascinating and delivered by one of the greatest science commentators of our time.
I watch (more like listen to) a lot of astrophysics talks and lectures.. You sir are outstanding! The humour, the clarity, the structure.. just brilliant. I'm gonna watch everything yt has to offer from you :)
Fantastic presentation by this great speaker. Looking forward to many more! Thanks to Gresham College for making this possible. What a wonderful time to be alive.
Chris joined us for a Q&A session as part of our new podcast 'Any Further Questions?' to answer all the unanswered questions we had during this lecture. Listen to it on all major podcast providers from Monday 25th September!
“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's long way down the road to the chemist's, but that's just peanuts to space.”
Island Universes: Discovering Galaxies Beyond the Milky Way 1641pm 14.9.23 and that, my friend, is the threat.................................. no need to cover it (alien life) as the various news media agencies are having a news conference with reference to that with NASA... or what allegedly passes for NASA. nice to hear Chris Lintott, on occasion, without him being censored by the attendant religious bodies hellbent on censoring the facts of the matter... speaking as another billy no mates type (of the male persuasion) he's basically talking about background noise, temperature and distance. which is something which you need to be come to terms with.. this vastness... as there are surely other aspects of the universe which need to be clarified. you're the metaphorical educated carrots and yer coming up with nothing new. i am learning nothing. learnt far more off my own bat... he's basically encompassed the entire back catalogue of the sky at night tv show in one chat.
@@chrislintott1 Island Universes: Discovering Galaxies Beyond the Milky Way 1731pm 14.9.23 !!??....!? and that, my friend, is the summation of the universe and all that we (need to) know... a vague notion regards something not being quite right out there or we're not being kept abreast of the matter at hand... it is another man's passion (your subject) but does concern us all.... i was wondering if his nibs, CL, will be chomping at the bit to cadge a lift on one of those private rockets being utilized to cast people into near space.....?
In addition to repeated statements of how big it all is, which of course is true enough, I would also like to see presentations on how empty it is. The speaker glanced at that with distances between stars, but there is also the emptiness of atoms and molecules, and whatever there is between the Plank scale and protons. If inflationary theories are correct, there also must be incredible distances between each bubble.
More cosmology in lecture six, I think. I like the fact that if you travelled to the edge of the observable universe from the top of the Earth's atmosphere with your hand outstretched to catch whatever you encountered, you'd be lucky if you got two hydrogen atoms...
ah. but is it? my understanding of the current proposal for the universe on the extremely small scale is that it is awash with energy fields, with vibrations that we perceive as subatomic particles, that then go onto to form, eventually, the structures that we see all around us. indeed, that we are nothing more than agglomerations of those fields, mutually attracted to or repelled from each other, that look like us.
What a time to be an astronomer, and even an interested layman. Of course, the same is true in most disciplines. Sadly, while science and technology are thrilling to many, we see a frightened backlash delving deep into religion, cults, and pseudoscience.
weird i know but i still miss him when i watch sky at night. i still remember various episodes towards the end when he woud say every now and again "but i won't be around to see it" when talking about the various probes etc popping out to planets.
Yes indeed. I'd like to think his cameo on a computer game TV show called Gamesmaster helped to encourage interest in the subject. He put in as much enthusiasm revealing cheat codes and tips as he did on TSAN. I'd imagine kids would take "his real self" more seriously if they'd seen the cool cyborg version first. He's just an old plump posh sounding guy with a monocle otherwise and easily dismissed.
Thank you for this eloquent discussion. I like to ponder rhat maybe each galaxy is just a molecule in the make up of that cosmic used car lot inflatable waving its arms...
Not only are there more stars in the Universe than there are grains of sand on Earth, but if our sun was a grain of sand, then our nearest neighbor, Proxima Centauri, would be a a grain of sand on another beach about 30 kilometers away.
If the entire mass of the planet was formed of grains of sand that number would be of the same order of magnitude as the estimates of the number of stars in the observable universe. So despite lacking precise numbers we're probably safe with that sars/grains thing. 😀
Would it be useful to use New Horizons for parallax somehow, since it would have a much longer baseline than the 2AU available from Earth over 6 months?
Hi! Thank you for the question! Chris gives a more detailed answer in the next episode of our podcast 'Any Further Questions?' which will be released on the 25th September.
Space is 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's, but that's just peanuts to space.
There are more shuffle states of a standard deck of playing cards than there are grains of sand on Earth. I tell you this for no particular reason at all.
Trouble is our concept and take cannot take in and conceptualise the reality of the existential, so scientists somehow fall flat because it cannot be comprehended, we will always be stymied by our system of communication ....language
We do not live on an ordinary star in an ordinary galaxy - Do we see galaxies that have spiral arms as regular like ours, have the quiescence of our galactic center, are placed in a quiet place in space as we are, have not had recent disturbances with other large galaxies etc.? Can we find a twin to our sun? The answers to these are no.
What a brilliant communicator Chris is ..engaging,funny ,irreverent ..his lectures are fantastically entertaining. Thanks Chris
I couldn’t agree more. He is superb. He’s right up there as one of the greatest science communicators of our time.
My only criticism here is I didn’t want this talk to end. Absolutely fascinating and delivered by one of the greatest science commentators of our time.
I watch (more like listen to) a lot of astrophysics talks and lectures..
You sir are outstanding! The humour, the clarity, the structure.. just brilliant.
I'm gonna watch everything yt has to offer from you :)
Fantastic presentation by this great speaker. Looking forward to many more! Thanks to Gresham College for making this possible. What a wonderful time to be alive.
This should have millions of views, great lecture.
Chris joined us for a Q&A session as part of our new podcast 'Any Further Questions?' to answer all the unanswered questions we had during this lecture. Listen to it on all major podcast providers from Monday 25th September!
This was a great lecture. Thank you for sharing this.
I appreciate the hitchhiker's guide to the galaxy reference
Well done.
“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's long way down the road to the chemist's, but that's just peanuts to space.”
Island Universes: Discovering Galaxies Beyond the Milky Way 1641pm 14.9.23 and that, my friend, is the threat.................................. no need to cover it (alien life) as the various news media agencies are having a news conference with reference to that with NASA... or what allegedly passes for NASA. nice to hear Chris Lintott, on occasion, without him being censored by the attendant religious bodies hellbent on censoring the facts of the matter... speaking as another billy no mates type (of the male persuasion) he's basically talking about background noise, temperature and distance. which is something which you need to be come to terms with.. this vastness... as there are surely other aspects of the universe which need to be clarified. you're the metaphorical educated carrots and yer coming up with nothing new. i am learning nothing. learnt far more off my own bat... he's basically encompassed the entire back catalogue of the sky at night tv show in one chat.
That may have been in my mind...
@@chrislintott1 Island Universes: Discovering Galaxies Beyond the Milky Way 1731pm 14.9.23 !!??....!? and that, my friend, is the summation of the universe and all that we (need to) know... a vague notion regards something not being quite right out there or we're not being kept abreast of the matter at hand... it is another man's passion (your subject) but does concern us all.... i was wondering if his nibs, CL, will be chomping at the bit to cadge a lift on one of those private rockets being utilized to cast people into near space.....?
Gotta love a "Hitchhiker's Guide to the Galaxy" quote.
Peter Jones. Very much missed.
Mind blowing!
it worked and it was delicate. the analogy
Beautiful lecture
We love Chris
i still think we're special 🙂 x
thankyou for sharing this..
"Space is dark, it is so endless
When you're lost it's so relentless
It is so big, it is so small
Why does man try to act so tall?"
- Hawkwind
In addition to repeated statements of how big it all is, which of course is true enough, I would also like to see presentations on how empty it is. The speaker glanced at that with distances between stars, but there is also the emptiness of atoms and molecules, and whatever there is between the Plank scale and protons. If inflationary theories are correct, there also must be incredible distances between each bubble.
More cosmology in lecture six, I think. I like the fact that if you travelled to the edge of the observable universe from the top of the Earth's atmosphere with your hand outstretched to catch whatever you encountered, you'd be lucky if you got two hydrogen atoms...
ah. but is it?
my understanding of the current proposal for the universe on the extremely small scale is that
it is awash with energy fields, with vibrations that we perceive as subatomic particles,
that then go onto to form, eventually, the structures that we see all around us.
indeed, that we are nothing more than agglomerations of those fields,
mutually attracted to or repelled from each other, that look like us.
It may be that it's a far stretch to define a field like that.
I wonder if you argue just for the sake of arguing when the reality is so obvious. Don't pick just one small range and ignore the vast emptiness.
What a time to be an astronomer, and even an interested layman. Of course, the same is true in most disciplines. Sadly, while science and technology are thrilling to many, we see a frightened backlash delving deep into religion, cults, and pseudoscience.
Patrick Moore is smiling.
weird i know but i still miss him when i watch sky at night.
i still remember various episodes towards the end when he woud say every now and again "but i won't be around to see it" when talking about the various probes etc popping out to planets.
Yes indeed.
I'd like to think his cameo on a computer game TV show called Gamesmaster helped to encourage interest in the subject.
He put in as much enthusiasm revealing cheat codes and tips as he did on TSAN.
I'd imagine kids would take "his real self" more seriously if they'd seen the cool cyborg version first. He's just an old plump posh sounding guy with a monocle otherwise and easily dismissed.
Thank you for this eloquent discussion. I like to ponder rhat maybe each galaxy is just a molecule in the make up of that cosmic used car lot inflatable waving its arms...
Wacky inflatable flailing arm man!!
That was truly horrific Chris, talk about insignificance when you think how long it takes to get to the nearest star!
Not only are there more stars in the Universe than there are grains of sand on Earth, but if our sun was a grain of sand, then our nearest neighbor, Proxima Centauri, would be a a grain of sand on another beach about 30 kilometers away.
If the entire mass of the planet was formed of grains of sand that number would be of the same order of magnitude as the estimates of the number of stars in the observable universe. So despite lacking precise numbers we're probably safe with that sars/grains thing. 😀
Would it be useful to use New Horizons for parallax somehow, since it would have a much longer baseline than the 2AU available from Earth over 6 months?
I think you probably could; what a fun idea! Gaia would beat both though
Hi! Thank you for the question! Chris gives a more detailed answer in the next episode of our podcast 'Any Further Questions?' which will be released on the 25th September.
Space is 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's, but that's just peanuts to space.
I do not hear you give credit to Henrietta Swan Leavitt during your discussion of cephid variables. Sad!
There are more shuffle states of a standard deck of playing cards than there are grains of sand on Earth.
I tell you this for no particular reason at all.
Trouble is our concept and take cannot take in and conceptualise the reality of the existential, so scientists somehow fall flat because it cannot be comprehended, we will always be stymied by our system of communication ....language
He says the universe (beyond the observable) is big^big but does not say it is infinite. But is there any evidence that it is not infinite?
I think the best answer is there’s nothing we’ve seen that suggests it isn’t. More on this, maybe, in lecture 6.
😊
14:50 Really? Let's meet for a pint!
If the universe is expanding and "Everything is moving away from everything else" how can two galaxys collide ?
They’re close enough for their gravity to interact. Same way the solar system stays together.
@@Just.A.T-Rex so only some things are moving away from some other things.
We do not live on an ordinary star in an ordinary galaxy - Do we see galaxies that have spiral arms as regular like ours, have the quiescence of our galactic center, are placed in a quiet place in space as we are, have not had recent disturbances with other large galaxies etc.? Can we find a twin to our sun? The answers to these are no.
"A single island universe" - this was thought up by a native of Britain, probably ?
Not an ordinary star! It is not a Red Dwarf Star.
The meaning of the word 'ordinary' is not restricted to 'the most common'.
Space isn't big. We are incredibly small.
The Universe is big compared to anything. We are only small compared to some things.
huiiiii
Everything is nebula.
Circular arguement...
*BullSchitt... There are No such things as Black Holes !*