Geraint Lewis - The Dark Side of the Universe
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- Опубліковано 17 кві 2024
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The universe is astonishing in multiple ways, and one of its most probative features is the existence of its dark side: dark matter, interacting only via gravity, dark energy, the mysterious so-called energy of empty space that is accelerating the expansion of the universe, and black holes, from which not even light can escape.
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Geraint F. Lewis is a Professor of Astrophysics at the Sydney Institute for Astronomy, part of the University of Sydney’s School of Physics. He is best known for his work on dark energy, gravitational lensing, and galactic cannibalism, the study of galaxies which collide and absorb parts of each other.
Watch more videos on black holes, dark energy, and dark matter: shorturl.at/eCHMZ
Closer To Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.
If there is approx 95% of the universe that we don’t see/comprehend, how can we think that we properly understand the approx 5% of visible matter? We have no idea what influences the 95 has over 5 across/throughout the universe. Events that occur in our observable piece of universe maybe affected differently beyond our observation edge.
therefore God
You can stop asking so many questions when you put God in the equation and no, it doesn't mean you have a low iq.
I mean, look at all the hurdles you "scientists" are facing through to just babble like you're smart. Believing in God takes more confidence this day and age. It's the counter culture actually right now 😂
multiple dimensions exist that we will never see or understand and the math we use fits the model we understand--so far..
@@aiya5777 So if you don't understand something, ergo God - like the ancient times?
@@kuyab9122 it's more like
if you can understand it, ergo God
to put it into perspective. just Why do ALL things have units? Time, length, energy, mass. units, just What are they?
and Why should we be equipped with the necessity to understand these units to begin with?
there shouldn't be any conscious agent creating the universe with a particular purpose in mind,🤷 egro the universe shouldn't have any particular purpose
And yet it's like the entire universe is written methodically, for the sake of being understood by us. the readers
2:56 Some serious dark energy there...
Even the interview has its "dark side" (or black screen I should rather say)
I think I could hear a wheeze.
Is it plausible that the current laws of gravity are just wrong for the very large scale of galaxies and as such dark matter does not exist?
Yes, that’s also possible, there are theories of modified gravity that are posited to explain the same problems that dark matter is proposed to solve, but it’s still very much up in the air
Please have Dr. Lewis back again
is it correct to understand that space as well as light is deflected or bends around galaxy? what might that say about space-time curvature / gravity of galaxy?
Any opportunity to better understand the dark factors is worth pursuing. Bravo
Why did Eddington’s eclipse measurements come close to Einstein’s prediction when dark matter was not even considered by Einstein or Eddington?
because of the small distance
Maybe the Galaxies are held together by surface tension, like a bubble of water on a desk, it should flatten out and be one water molecule deep but it keeps it's form as a bubble or drop standing as high as it is wide.
Did Closer to the Truth look into the Electric Universe theory at any point.
I find it odd that we see as much Matter 5% as we know about our Oceans 5%.
black holes have some form of dark matter rotating around in galaxy, as well as ordinary matter? how might measure dark matter rotating around black hole?
1:03 let's run through that cause you it's important to understand how that works cause you're just making a statement that I know was true but I want to understand how it works so how does gravitational lensing allow you to determine the amount of total mass dark matter plus ordinary matter how can lensing help you determine that. 1:24 GL:
We don’t actually know. Dark matter and dark energy are hypothetical concepts for gravitational enigmas we’ve yet to solve.
I don't believe in dark matter/energy. I think there is some fundamental aspect of space-time that we don't understand yet.
This is the best we get, science has to start somewhere
my back is hurting just watching this
Genuine True Believer this Cosmology Bloke.
The fact is we have these observations. How they are interpreted is of course up for grabs, I think there's a non zero chance 'dark matter' will turn out to be some other effect or set of effects but we will find that out by doing physics and cosmology. It's only by practicing these sciences that we even have these questions at all.
@@simonhibbs887
Questions come from Human IQ.
Science is a Subset of that.
Any Human Can Ask Questions.
Sound Science can Withstand Questions from Anyone and Everyone.
@@chrisgriffiths2533 Sure.
❤
The problem of the physicists is the term 'matter'.
Matter is everything that exists in all its states - solid, liquid, gas, quantum (and transitions). Wonder why they call the quantum state 'dark' ???
The universe doesn't have "sides"
Apart from other potential universes .
The dark side of the universe is undisturbed frozen vacuum pressure where time doesn't exist not even a second but inside this universe there is moving pressure all around the universe and on different levels of cooling temperatures viciously moving through wormholes and emanating microwaves out from pressure and turning into electric magnetic gravity because it is still in its cooling stage and then it is squeezed into electricity and will remain electricity until it is ready to start shedding radiation dust and then the dust is used to form spheres to be used as a powerhouse for generating microwaves that can generate enough heat to reach the level of a star but on a microscopic level it's all about the nucleus which only generates a few microwaves around itself and every time the value drops within the nucleus before it starts decaying into a different generator creating the same microwaves but on a smaller scale of energy. This is being repeated on all levels of existence regardless if it's galactic or microscopic this including the center of suns stars and planets and moons and black holes but things that have been pushed around by explosions and gravity are not a part of the equation of something being stable it's just only a missing link and bound to land anywhere inside the cosmos.
Antimatter can be created by freezing gravity at a very high speed inside a vacuum chamber and maintaining the right amount of cooling pressure that can freeze gravity back into a invisible milkshake foam inside a small box chamber enough power to support a planet on top of it before it could start emanating heat and turn into a supernova.
There are three rates to consider. 1. The diminishing effect or draw of gravity away from the center of mass. 2. The increasing rate of time away from the center of mass. 3. The increasing measure of distance away from the center of mass. Speed is measured by time and distance which change and that changes the speed of light and causation. Distance gets longer without gravity and time goes by faster, both of which speed up causation. The light has to arrive at a farther distance faster when distance is stretched *and* time also goes by faster. *Then* there is the first thing to consider and that is the diminishing draw of gravity which means things eventually slow down the farther away they are from the center mass of a galaxy. (It's not complicated.) 😎
All of which is captured in the equations of general relativity, which physicists use in making these simulations and calculations.
@@simonhibbs887 Jungle likes to ignore the basics of relativity to tell his 'stories'.
@@tomjackson7755 You like to say nothing at all.
@@simonhibbs887 So you agree that the speed of light changes away from the center of mass compared to our measure of distance and rate of time closer to the center of mass.
@@JungleJargon You like to say obviously wrong things. Remember gravity doesn't effect time. Remember your measurement relative of another object doesn't change what the object's actual measurement for itself is.
There are more stronger dark matters than life itself and it is always growing. For man, he has every part of light but he MUST use his limbs or get recued for reincarnation. Every single being who have existed MUST finish his part on earth.
The radius of the known universe is somewhere around 100 quintillion miles.
Wrong
No flies on this guy.
Except for that pesky blood thirsty vampire fly going for the jugular and soaring around looking for a 2nd jab.
You want at least one fly 😂
And yet we are so sure we know 😁
Sounds like he enjoys his work.
When you get down to the measurement of the universe, what is seen is only the sruface. When you get into what is beyond the spaghettification of the surrounding black hole, you must apply the matter is not destroyed. Essentially, the mass and matter emitted through Earthly/Heavenly prime universe is transferred through the crunch. Ideally, if the entire universe is measured, humanity is arguably 3% total informational weight. The power that could be harnessed on the brink-point is beyond dangerous. ARGUABLY this is the true Hand of God. The final frontier. Do not attempt to harness BHE. God will strike us down.
I took Astronomy because I wanted to complete my AS requirement, which I started in HVACR. I have come to the conclusion that the foundations of the cosmos are not natural, but supernatural.
The more willing people are to leap to supernaturalistic explanations, the lower their standards for what constitutes truth.
@rob.j.g Unfortunately for you, I am smart enough to do so and you aren't smart enough to know whether I did.
@@EnthusiasticTent-xt8fh
Now what caused you to reach that conclusion ?
@@EnthusiasticTent-xt8fheverything looks like magic until we start exploring it.
@@ManiBalajiC Sorry, but Magic is the foundation.
For whatever reason people don't understand what is the point. The claim the Quran has been memorized has never been tested. Are you interested? Do you think it is a trivial matter? Does it matter at all? Muslims say the Quran has been memorized and atheists who want proof and evidence don't seem impressed and believe the claim without questions asked. Either many people are pretending to be much more intelligent than me or atheists don't care about evidence. If someone is able to write the Quran from memory i would be incredibly impressed. Are you kidding me?, to memorize the Quran would be the equivalent of running one hundred meters in one second. Atheists would not be able to prove their own existence to themselves if the logical conclusion is God exists and lose their own children believing without questions asked that gambling causes a brain disease, and when they are told they don't care. I will give my three bedroom flat in Spain in the city of Burgos to the first muslim, or any other person for that matter, who writes the Quran from memory. Who wants to accept the challenge? I am a psychologist and person of many talents and I have discovered atheism is a logical fallacy that assumes God is the religious idea of the creator of the creation to conclude wrongly no creator exists because a particular idea of God doesn’t exist. The true God is Spinoza's God. Thank you.
Gods aren’t real
you're giving too much credit to yourself🤭
Pure speculation. Pure ignorance. Ultimate pretentious. Pseudoscience.
It’s scary.
We want the universe to care about us.
But it doesn’t.
it's a lot scarier to see you ignoring God who blatantly told us that he created his creations *in darkness*
@aiya5777 he's giving them a chance to believe through unconditional love. Time's running out though