The Early Universe - Professor Carolin Crawford
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- čas přidán 30. 06. 2024
- When did the first stars form? And how did they assemble to form the earliest galaxies? www.gresham.ac.uk/lectures-and...
We shall look at what happened during the ‘dark ages’ that span the period between the Big Bang and the first galaxies, and see how the very early Universe came to resemble the one we see around us now.
The transcript and downloadable versions of the lecture are available from the Gresham College website: www.gresham.ac.uk/lectures-and...
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I hope that Professor Crawford is aware of the great facility she has for education and the sheer joy that she has created for some of us out here watching these lectures and sharing some of her knowledge. Thank you Gresham college and thank you Professor Crawford.
Thank You Professor Crawford for making this series of lectures available for everyone.
I was at this lecture. Absolutely superb and ENTIRELY Free to attend!
I just came across the Gresham College channel recently, and I've really enjoyed Professor Crawford's lectures on astronomy and cosmology. For me, they fill in the gap between popular documentaries (which are a little too entertain-y) and some of the more formal lectures (which are a little too equation-y) available on CZcams. Crawford does a wonderful job presenting the material in a way that an interested sub-academic like me can understand.
Big thanks to Gresham College for sharing these videos.
Totally agree!
my thoughts
+J Bennett (The Speculating Ape) She manages to walk the line between a prepared speech and simply winging it from key points. The ideas flow smoothly with little in the way uhm's and ah's.
I hope this professor will do a lecture series again in the future. I think she is the best in communicating difficult topics in such a way that everybody with some IQ can understand them.
I still enjoy watching these lectures again and again.
Another well thought, well delivered lecture. Thank you Caroline, for dedicating your time to educating people. And Thank you Gresham College!
Carolin, you are a natural science communicator. A recent comment said you were the gap filler of the dumb-down science for the masses and the graduate level stuff and I think thats spot on. It's most definitely addressing a gap in the market (?) so please, you're such a natural, do lots more!
Crawford's talks are awesome.
This video was EXTREMELY informative and appreciated. 👍
I recently discovered Professor Caroline Crawford's lectures from Gresham College . I just love her presentations! She keeps things focused, and well explained. I have three of her lecturers under my belt and I intend to watch ALL of them. Wish she lectured in my home state in America, I would surly go witness them. Thank you Caroline for your efforts in sharing your education and wisdom with us.
So clearly explained. I just love her lectures
What a clear and complete lecture! Remarkably well delivered!
Carolin is a great communicator and her lectures are just at the right level for those wanting to take the the next step up from Brian Cox and Neil Degrasse Tyson without needing a degree in maths or physics.
She's a very good lecturer very understandable. Looking forward to finding more of her talks.
An excellent topic most eloquently presented by an extremely well read Prof Crawford. Also well versed in public speaking using both tone and tempo in her presentation to enlighten and entertain us. I thoroughly enjoined that. Thank you Prof.
just excellent she does a wonderful job of explaining natures phenomena
I'm in love with my universe 💖💖
More! More!
Amazing lecture.
Would it be possible that the very first massive population 3 stars actually formed the super massive black holes at the centre of galaxies? It wouldn't be the first time scientists had looked for something that was right under their noses!
Even when those guys rush the stage and try to kiss the Professor she doesn't miss a beat!
Richard Feynman : "There is an expanding frontier of ignorance..because we know that we do not know all the laws as yet.Therefore things must be learned only to be unlearned again or to be corrected
Very good,
Very cool talk. I never thought about how hydrogen absorption over redshift would cause that kind of effect on spectroscopy.
our existence in combination with our apparent survival seems more difficult to believe, considering the ongoing violence surrounding our little watery pearl, than all other possibilities out there combined.. satan, god, budah, and krishna... why not, we're here. And we have classical music !!!
3:15 It was a cupfull of hot plasma on a sideways hot plate, floating in the middle of no_thing. Hot plates are truly ubiquitous.
Great lecture. One question. Why would the recombination of ordinary (light) matter cause the dark matter to start clumping together ?
18:22 Redshift chart.
very interesting...but i lost her at the quasars redshift
This saved me from an awful final thank you!!
Galaxy is like a space volcano what the Hawaiian Islands
I love it when she says : "if only it were that simple" (30') .
This notion may very well have triggered mr Darwin , unsettled by creationism's simplicity , to investigate the diversity of nature himself .
Once under an apple tree , mr Einstein may have reflected mr Newton's gravity laws and thought : "if only it were that simple" . . . We know the result . But is it final ?
Big Bang is a great concept , but what fueled / fuels it ?
Einstein's Laws may be fine well into extreme Gravity Wells like 1 galaxy in a singularity , but somehow i have this nagging feeling that at a certain stage , like when you keep pumping galaxies into a black hole , a Fifth Force takes over and implodes the singularity into a universe .
From the outside , in its own Space Time Continuum , time inside the singularity does not proceed , but mass is still absorbed . Until it reaches a critical point of say ½ our Universe's mass .
I don't know . It's so bewildering . Like "Where did *that* come from ?" . That's one of the main problems i have with Acceleration and Dark Energy .
If our Universe were Closed ( collapsing under its own weight at the end of its life cycle , instead of expanding forever ( Flat ) or evaporating completely ( Open , Accelerated ) , the implosion would simply trigger another cycle .
Where does that Dark Energy come from ? It is introduced to explain increased red shift at very large distances in a hypothesis that supposes accelaration . But the very large distance implies a very young universe , in which its mass is way more concentrated than it is now , adding redshift to any EM radiation that moves away from it ( ie towards our telescopes ) . Or am i dumb ?
Apparently simple things often simply are *not* very simple . That's for sure . "If only it were that simple" triggers the sparks that push Humanity forward . I love it .
Being able to share such ideas through the Web , exposing them to ( hopefully constructive ) feedback from other Webbers who are way more versed in these matters , is something that i'm utterly greatful for .
WWW - What a Wonderful World
Good lecture, thanks. I think our universe comes from fluctuation and inflation of energy and shooting out from a very big black hole or white hole as big as the diameter of our universe and expanding and evolve to nowadays. This black hole or while hole comes from the universes-galaxy including trillion of trillion of billions of universes. When this black hole or while hole exhausted it’s energy, our universe will stop expanding. What happen next, you can add in here for me and other people learn more. Thanks all.
could dark mater efect red shift ?
I'd like to be stoned while listening to one of her lectures its so mind blowing
You might pick up more if you weren't, though.
I can never get my head around the further you look the further back in time you see. if the universe is expanding over time then the further you look back the smaller it was and the closer everything was together so somehow or other the further you look the closer you see? look way past Andromeda and you see it as a baby much nearer you but as viewed from far further away? it's a puzzle😕🔄➰🔙❓
Very good point. Maybe the big bang theory has some problems. If you are looking at light from 13 billion light years away how would it be possible to see that light coming from opposite directions, as she stated the universe appears to be the same regardless of the direction you look. This makes no sense unless we are at the center, which they say we are not.
The theory states that there is not a beginning or an end to the universe.
+spajohnnie My understanding is that the big bang was some kind of beginning. But that an accelerating universe means that there will be no ending.
if the universe kept expanding after the big bang, shouldnt it be at or faster than the speed of light, because if all material came from the big bang, how come we exist now and still are able to see the light emitted(cosmic background radiation 4:30) just after(/from) the big bang, i mean the atoms that we and our solar system are made of couldn't have traveled faster than the cosmic radiation of the big bang....could it??
She was so much more pleasant to listen to than the new guy with all his ummm ummm ummm.
I turned that one off. Couldn't take it
how dumb would it be to fit some rockets or solar sail to Hubble and place it out further away once its current mission ends? If it went to the edge of the solar system it would be able to send back images from a greater distance.
im not really qualified to answer this with certainty, but i come to think about a few things, first the communication with hubble will be mega delayed, hubble is very bussy, maybe they lose 30 percent work time.. theres not much sun out there.. and in the big picture, its to short distance putting it out there, its like taking picture on a mountain and maybe move ten meters closer, makes no big difference,
The solar system is so tiny compared to the universe, there would be no advantage.
Like looking at the moon, then stepping on a stool to get closer.
okay I think this must be space-time: if you look at the top of your garden it is further away than the bottom of your garden but if you look way past the top of your garden you may see the bottom of your garden as it was last year even though the bottom of your garden has never been further away than the top - not this year, not last year but in spacetime it is.....S-P-A-C-E-T-I-M-E for my medicine.....🐒
Oh dear me ! Now we know for sure how the universe was formed / or born , and here's me thinking it was just a theory. Ah well !