WSU: The Dark Side of the Universe with Michael Turner
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- Опубліковано 27 сер 2024
- Theoretical cosmologist Michael Turner, who coined the term "dark energy,” explores how the combination of cosmology and particle physics will help us understand the origin and evolution of the universe. #WorldSciU
This lecture was recorded on June 1, 2014 at the World Science Festival in New York City
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Thank you so much WSU for your educational generosity.
Yes
I think, with all the worlds problems, its a great time to be alive. I often ponder about cosmology with facts and theories my ancestors could only dream about knowing.
I attended a virtual lesson with Dr. Turner about dark matter over the summer, and he is every bit an amazing teacher and such a kind person. Thank you for sharing this!
Just approaching the end of this talk and wholeheartedly agree with your observation. How I would have loved to have had professors/teachers who possessed Michael Turner's clarity and playfulness. 💫🐈
Loved his sense of humour
One of the MVPs on youtube.
Love the content, keep it up
Oh? 💫🕳🐛
Looking forward to this talk. Just about to make a fresh pot of coffee. If anyone else needs a cup, just holler. ☕️
the deeliciousplum me me
David Haller
This will give me a lot to think about and consider, thank you.
I really love this series... Fascinating! Thank you. 😍
Appreciate the sharing of this lecture
14:44 How do we know it's not dust? Because space is a vacuum.
21:28 Axions are the cleanest theory.
I love this channel.
Great content 👍
Ooh.. this is great information.
Thank you very much.
Quote: What you’re supposed to take from this is that this is a pretty believable model. There is some evidence for it… THATS WONDERFUL!!!
Now the next step would be to somehow show evidence that agrees with what we observe in the cosmos, instead of just mathematical equations of hypothetical fundamental forces that are injected into the field of cosmology in order to make prior mathematical equations work that once again didn’t have any relation to observable stellar phenomena.
Thanks. Great thoughts
I'm not college educated, I'm here because this is interesting
Cosmologists still don't get it. The further out they look the less detail they see. The new telescopes still look at distant objects as a person in a valley looks through the haze at a far mountain. Yes you see mountains exist, perhaps even what mountains are made of, yet they will never understand mountains until they go to one and look back at where they once were. Then the wise ones will realize they can know nothing of the valley from the mountain and should have stayed home in the first place, enjoy the fruits of their labor and accept the universe as an unknowable and glorious mystery.
superb! thank you!
A lot has happened in 6 years!
Super symmetry is basically now super dead as it continued to find nothing in any form that wouldn't have already been detected if it exists so statistically WIMPS can be largely ruled out despite the so called "WIMP miracle as all the nice WIMP solutions that actually fix the problems which it was developed.
The Axion is an interesting case as there is some weak evidence for it more than WIMPs could ever claim.
Related to Neutrinos if one of them has zero mass there could be heavy sterile Neutrinos which don't interact with the weak or strong forces would be able to explain dark matter. This interestingly has a detection of a particle annihilation that exactly matches the energy one of these which is a problem for dark matter analog should have thus ironically its best evidence is also its worst critic. But if they have a really long half life it could explain dark matter.
MACHOs and Neutrinos exist but like visible matter there isn't enough to account for Dark matter.
Interestingly MOND which was initially developed as an alternative explanation to dark matter, though it never really explained it since it is empirical fitting and saying gravity works like this, may be additional evidence for Dark Matter. Recently it has been noticed that MOND equations look similar to the superfluid Bose-Einstein condensate (BEC) like Liquid Helium. As regular dark matter fails to easily account for this deviation in galaxy rotation curves but MOND fails in clusters or to sufficiently explain things it may be that both are true and that Dark matter can undergo a phase transition suggesting it can interact weakly with itself. This is also supported by the identification of a number of dark matter poor (or rather unneeded) ultra diffuse galaxies which suggest dark matter can be tidally stripped. It is an interesting time who knows what the answer will be if we ever find out.
Type Ia supernovae are looking to be unreliable as the unrealistic assumption that they all blow up at the same point and always annihilate each other. Nowadays we can say this is *definitely not true* since we find surviving remnants and identified several mechanisms to generate these explosions. One example 3 Kpc away is particularly interesting as it managed to not only survive its explosion but to reestablish hydrostatic equilibrium.
Other methods since to measure the age of the universe by using the distance ladder to measure the rate of expansion are taken into account have been shown to give very different results depending on whether the results are related to properties related to the CMB, notably including Baryon Acoustic Oscillations, and more local measurements give very different results with local measurements giving older ages.
Surveys of the sky most recently the results of eBOSS however have found that while the universe initially was homogeneous, i.e. isotropically distributed, the local universe strangely is strongly anisotropic far more than should be expected according to standard cosmology and moreover is getting more and more skewed with time and direction. The initial survey results seem to have both looked along the same general axis since those directions were the part of the sky we can actually reliably observe i.e. we can't see through the disk of the milky way.
So whatever is causing Dark energy appears to *anisotropically* distributed which is far stranger than a constant dark energy. What this means I have no idea nature always throws surprises at us.
Space is alive and conscious
Checkout Penrose's "evidence" in the CMB for a previous Cosmos => "Conformal cyclic cosmology " and 'Hawking Points'
Woop! Can't wait..
Nooooo
@@bhargavapothakamuri4218 - Hmm?
RooRaaah Crumbs, nothing I thought I was the first to comment. You beat me by a minute.
As I’m not a physicist but an Engineer, I am fascinated by the unsolvable mysteries. So just had a cheer leader moment.
whats this about Zwicky? Why they say he "didn't play well with others"?
Amazing lecture !! Where’s the Alan Guth episode ???!!!?!?!?!?!?!?!?!?
Top 5 astrophysicists in my opinion :
-Brian Greene
-Adam Riess
-Carl Sagan
-Alan Guth
-Michael Turner
Fake scientist:
-Bill Nye
Good talk. Wish he didn’t stand directly in front of the slides, blocking some of their content.
Will someone shine a light on Dark Matter and Energy and tell us all..
What it is???
49:00 so we can say that opposed to normal stuff where the pressure is incomparable to energy density , the "dark energy" or something where they are pressure the space time fabric should boulge out ?????????
Thankyou
Could dark energy be pressure from all the supernovas that have ever occurred, pressure on a cosmological scale.because this is always increasing so would the effect I.e the size of the universe would increase.
Dark matter was always the biggest portion of the universe.
Stars and black holes also convert matter to dark matter.
When dark matter converts to dark energy. Energy released.
This happens when it is out of a gravity well or it’s EQUIVALENT.
Dark energy can also condense into dark matter. Energy required.
EQUIVALENT can happen almost anywhere with the right combination
of gravity and velocity nano flares happen.
I don't like his lame joke much but it definitely makes the talk not dry and clinical so overall I appreciated it
1:43 No I haven't. What's the Ω parameter?
We still hear physicists speak of the grand theory of everything. They need to shut up until we know what everything is made of first. Trying to come up with the grand theory of everything at this moment is akin to the ancients inventing gods in the heavens for everything they didn't comprehend.
Ouch. That Afgan joke didn't age well. Oops.
I thought, I bet the guy in the cave was having an exciting time, hunted by special forces,drones and satellite data. Now that is exciting putting aside the morality and rights and wrongs.
damn that one dude cant stop laughing yD
Yes that’s my
My eyesight is also low that i read 30% as 33%
You know ? Our food is many colors , what color exactly is that noise if the noise has colors inside of it ? Check your colors ????....:::::::::::::::::::::::::::::::::
A new interpretation is needed for the Bullet Cluster.
It will show the unnecessity of Dark Matter.
@t
These two galaxy clusters A & B collided recently (150 million years ago). B is the Bullet Cluster. It is said that this Bullet Cluster provides the best current evidence for the nature of dark matter.
One important fact is that almost all galaxies and stars keep staying inside of their own original galaxies. Only their gas lumps collided and heated up, and were emitting X-ray, but were stripped off between two galaxies.
Then, some questions arise.
Q1: Time has already passed 150 million years. How these two gas lumps can keep their shapes without the gravity of their original galaxy clusters?
Q2: Why didn't these two gas spread away because of their heated-up high pressure? Of course, these two gas lumps have their own masses. But they are not enough to keep them stay as they were.
Q3: The mass of gas is about one-sixth of its whole galaxy mass. One-sixth is still big. Even though, why are there no indications of masses of the gas through the investigation of the gravitational lensing?
Q4: Why is not the loss or gain kinetic energy or momentum of each gas lump equivalent? MBgas and 'db' are smaller than MAgas and 'da'. 'da' must be much smaller, or 'db' should be bigger.
(MAgalaxy + MAdark + MAgas) : (MBgalaxy + MBdark + MBgas) ~ 10 : 1
MAgalaxy : MAdark : MAgas ~ MBgalaxy : MBdark : MBgas ~ 1 : 5 : 30
I am here also ...:D
41:30 please stop using that over-used incorrect quote: "extraordinary claims require extraordinary evidence". Nowhere in the scientific method does it say that. That quote has created a culture of fear in science where scientists are afraid to study things that are not as well-understood or well-studied. It led to this toxic culture of "fringe science", which of course is ridiculous because if something can be studied by science, it doesn't matter what the topic it is. It is still science. So for the sake of science, let's stop using that quote.
Gary tails.
pops up at 666 views ...
Neuterino
Super cemetery
What's with this guy and how he pronounces his words?
Sheldon is real!
This was as useful as a chocolate teapot ...
I find the same theories by different cosmology lectures give tiny insights. I knew but didn't recognise that our solar system planets don't follow the same rules of rotation as a galaxy?
When We supply The Flesh with The natural resources we wouldn’t slow down ? The one’s moving fast must be A young Age ??? : on The reverse it could be going into the Womb ?? Dying ::::::::::::::::::::::::::::::::
why not Black Holes!!!!!!!! (all of them!)
🤕... even the Universe has a shadow? ...🛶
Yay I’m the first.
Quantum dark matter.
There I said some very very smart, for me.
Second in the many worlds theorem .
Maybe the universe is eating to much and it’s expanding its waistline 😁😁😁😁😁