Me too!

Me three

Yes! Including all the“Compressy” parts. (I love that physicists sometimes modify the terminology just for fun) Accuracy is important, yes... but so is fun.

Me fourth!

Yes, please. We want all of it! :(

It just might! 💥

I think you just won the internet

​@@MrRoverno Uh oh, I have no acceptance speech prepared, but thank you, it's an honor! Though all the credit really belongs to Dianna and Michael for the word inventions. :) I'd also like to thank Dianna for making science more exciting and adorable. I saw your comment as an opportunity to be silly so I had to jump on that. I do genuinely appreciate all the likes though. It's nice to win the internet every now and then.

@@jeronluminourm Your award will be delivered after you pay the $10 billion registration fee. This is the internet after all...

@@seriousthree6071 Well, so much for my hopes and dreams. Utterly crushed!

111111 is

I appreciate the work done in the field of space but do inquire as to what good it is if what we see has already happened many many years ago? Knowing has its benefits for sure but how does the past integrate to our present? I also want to ask how much of what is offered is educated speculation? There is much we know but for sure there is much more we do not.

​@@larrybe2900 Learning about what hapened in the past and how the universe works gives us insight into how we can exploit its laws to improve our tools to better our understanding of reality. Plus it is our curiosity that has brought us so far, else we would probably have gone the way of most other apes, able to use rudimentary tools and create societies but unable to improve upon our knowledge and benefit from it.

@@Soken50 If an assumption is deemed a fact and later proven wrong what has that done to the thinking in the mean time? I know much is derived from colors of light but that does not explain everything. There is some light that never has reached our eyes here on earth. What about that influence?

@@larrybe2900An assumption cannot be a fact, that's not how science works, at best it's a hypothesis to be tested. No idea what you're on about with colours of light.

@@Soken50 Basic material known to man when heated will emit a certain spectrum of light. That is the limit of my knowledge to answer you. It takes a mighty intense event to offer light that we see light years away. Assumptions have to be made because we were not there to know so whether the term is hypothesis or assumption is only germane to being scientific. Assumptions can be derived from a hypothesis and can turn out to be wrong but in this realm of discussion we may never know it because not all the facts presented themselves.

I so agree!

Absolutely! And please don't hesitate to ask a few difficult questions for those with only an undergraduate BS degree.

It is brilliant to be able to hear science explained in such an informative and mentally expansive way.. its a shame that this kind of open learning isn't shared in the mainstream, but then the truth is those that hold power don't want this kind of mental agility being commonly explored.. its a shame, because we could make so much more of our species if that where the case..

The day you stop learning is the day you die.

bwakel310 Naaaa ... I'll probably learn from that Too .

wish I had access to such a class

@@elck3 there's one 'introduction to general relativity' by leonard susskind, uploaded by stanford to here on youtube

@@thomas.02, thanks I will check it out

What - all this in one semester ! Better allow a 10 year timespan to let it all sink in.

> Exited to start GR classes > 2 classes in, falls asleep.

Only when you truly understand something, you can explain it to someone else. This was extremely fascinating and a real eye-opener. Thank you!

Thats how you know hes a very clever man.

May be it's not only the science 😄 don't know 😉

​@@mitoschumacher nah, gotta be science ;-)

I know its making me happy just to see Dianna like this so totally in her element! ♥️

Yes I noticed that too, and the way he was looking at her, well, it seemed to me that he was, as Dr. Mallard would say, "quite smitten".

Was any of the collision turned into heat? Could James Web and LIGO work together?

1 - I think what he was trying to say was that the steel bar would rip, i.e. atom from atom, rather than that individual atoms would. This is functionally equivalent to breaking the bar (or tearing a wire, say).

@@kernfel Ok, but I don't think it was super clear, and it would be quite cool to learn what force is needed to overcome strong nuclear force between atoms, and also the gluon forces between quarks.

@@qingyangzhang887 I recently learned from an earlier Physics Girl video that it takes so much energy to pull quarks apart that the energy you're putting in creates more quarks as you go! But the issue here is really more about the detector. Spinning a pencil around your finger creates gravitational waves just very small ones. Any time anything moves around at all the gravitational field changes and you will create waves, including setting off a nuclear bomb, and a little bit of mass will be converted into those waves. It's just that it's a tiny tiny amount so you need incredibly energetic cosmic events to move the dial. Even if you annihilated your steel rod with an antimatter steel rod (and somehow survived the experience along with your lab) you wouldn't detect the gravitational wave.

In regards to 2.): We can calculate the energy release by treating the holes like two lumps of soft clay and asking if there's any energy the clay cannot just absorb. For example; two lumps colliding head on for will form a larger lump whose speed can be calculated with basic Newtonian mechanics. 'Cancelled' motion is converted to heat absorbed by the clay. Likewise two colliding holes can do so head on without emitting energy as gravitational waves. But two holes in orbit cannot do this just as two lumps of clay cannot merge, let alone form a stably spinning lump without shedding a lot of angular momentum. This cannot just be 'cancelled' and converted to heat, it must actively leave the system. From such thought experiments we find that the direction of hole spin relative to their orbits will result in more or less mass (As a percentage of the whole) being converted into energy. If we look at this we find something interesting, the resulting hole will always have a larger volume and surface area (horizon) than the two smaller holes even if it has less total MASS.

1. spinning steel bar does not create any gravitatioanl waves that travel away from the source/mass. You could ripp atom appart if you used the right frequency to do so.. 2. I think no mass is converted into energy.. do not the teach that in BH all mass is destroyed? so how come suddenly there appears mass and why should this mass explode or collide? do any two vortices in the nature explode? what a rubish..

Also, it apparently counts a little bit slower than those Red Clocks. However, after few picked moments from interview, it looks like it count same amount of seconds as right clock, but sometimes it desynchronizes and them it catch up. So maybe, it is connected to some atomic clock, but we observes network issues? Or maybe the Reds don't ticks correctly :) Moreover, 1247943567 seconds from now is about 39.55 year, so maybe it counts seconds since: en.wikipedia.org/wiki/Solar_eclipse_of_February_16,_1980 but I dunno :( just blind guess :)

Hi there, Veritasium made a similar video and they dug a bit deeper into this specific question: kzfaq.info/get/bejne/n9aYltx_vKyoYWQ.html

booooo ;)

Did you not mean "things influenced by events in the future" ?

@@7cle both? too hard

@@7cle I didn't say that I understood it. Aren't they equivalent?

jimbert50 you are right. It’s the same. I have trouble getting my head around it !

Well you know, when you say you understand quantum physics... then you don't.

I think this is a great question with some significant potential implications. If it is so, and we could find a way to manipulate it, maybe we could use that to exceed the speed limit. And why not? We can alter the stiffness of physical objects, through heat and such. Thanks for the interesting question!

@@jeronluminourm Here a nice video on manipulate it. Enjoy! (I did)

It might be related to the extreme weakness of gravity (fridge magnet vs planet, fridge magnet wins). The gravity due to a steel rod in the lab is tiny to start with and so the changes in gravity from spinning it are going to be on a similar scale. Stiffness is a measure of how much something moves for a given applied force so if you think of one of those rubber sheet visualisations of gravity the weakness of gravity corresponds directly to the stiffness of the sheet-- unless you have a massive star or something you don't make much of a dent in it.

@leicanoct but why, is it a constant because of the limitation of the fabric of space which the energy travels trough? And if so, could we manipulate the fabric to alter the "constant". Is the speed of light relative to the fabric, or is the limit bound to something else. Like the speed of sound, which can travel a lot faster trough rock, because it is more rigid, than air.

@@jeronluminourm I'm thinking that the speed of light limits stiffness. Having perfect stiffness means being perfectly in-compressible and that implies information traveling faster than the speed of light, something we know can't happen. I'm not sure how you were thinking your hypothetical manipulations might work, but if you were thinking that compressing spacetime might offer a shortcut in distance between objects, I would argue that you would still need to travel through the same amount of spacetime as before, just a denser version of it. I'm betting that the increased costs would (at least) cancel out any benefit.

you say you understand it? then tell me how this gravitational wave attracts things.. And how can it even attract if detouched from the source?

In school, you studying only the isolated facts, so you need a rote memorizing skills to get more Mark's, and prevent you from seeking the further knowledge by depth learning to understand from core and make you progress and think independently, because your complex brain needs more insight to keep that memory longer. So, you're lucky

did she have an immature attitude before?

@@841ONUR Yes, tbh, not extreme tho.

Danon A Old show biz saying. Always leave them wanting more.

raztubes not until I saw this comment. Thanks for that.

I just said the same thing, lol.

Not after they use the quantum eraser

Gravitational energy, as I understood it. There would have been additional mass converted to other forms of energy.

Yeah, when I learned that three solar masses "disappeared" during the convergence at a Silicon Valley Astronomy talk a few years ago, I was blown away! Mind-boggling numbers and extreme physical events that the tiny human brain has difficulty comprehending! Actually, jimber150, from what I heard, the net loss of the merger totaled something like 3 solar masses. This was just the difference between the sum of the two black holes masses and the resultant black hole's mass. So not all of the 3 solar masses converted directly into gravitational energy. A good question is how much went into gravitational, and how much into other forms: heat. fusion, light, etc.

Maybe physics girl can ask that question in future😉👌

@@dudeonbike800 and how could they possibly find this out?

He said none of it came out as light, which is kind of expected, because even light can't escape black holes. And I think he said that all of that energy was converted into gravitational energy.

Killer Nova ☠️