I never was much of a science student, my strength was more in the humanities. Today, you helped me to understand what i never understood before. Thank you very much!
Guys, can you believe we get to live in this universe! The fabric of space is tattooed with its own history, like a sidewalk with faint impressions of autumn leaves that landed when the concrete was first poured. Top tier universe, really great work!
So just by existing, you mean to say I have already left a lasting mark on the universe? Like, even if no one remembers me or the things I've done over my lifetime, the universe itself will always remember me? That is incredibly comforting.
Never have I understand people's need to leave their mark in history. I think we would all be better off without the need to somehow make history remember you
@@josephdooley981it's almost like we're social animals that crave closeness to others, and the idea that one might still be remembered and spoken of fondly after their passing is a part of that. Youre weird.
Delighted by how this video made complicated physics easily understandable. Fascinating to learn that the universe essentially has a "memory" and the potential this bears for uncovering the universe's enormous mysteries.
But her hand motions are super contrived, exaggerated, and distracting. It’s like the dubbed Japanese early Godzilla movies. 😂 She’s ruining her natural skill and beauty. Listening to an audio book would work better, I had to look away and try to just listen. It’s like someone giving a presidential speech and also trying to win the silly-face Olympics at the same time. It just doesn’t work. 😂❤
@NotesbyNiba is by far the best presenter on UA-cam. And I've seen many well-presented videos in the past decade-and-a-half. Exceptionally communicated science.
This is the first time I've heard the public definition of "gravitational eddies" that has been a hallmark of Star Trek shows for decades: Great introduction to the science of gravitational-interferometry after LISA goes online! I'd like to be a student!
“Eddies,” said Ford, “in the space-time continuum.” “Ah,” nodded Arthur, “is he? Is he?” He pushed his hands into the pocket of his dressing gown and looked knowledgeably into the distance. “What?” said Ford. “Er, who,” said Arthur, “is Eddy, then, exactly?” Ford looked angrily at him. “Will you listen?” he snapped. “I have been listening,” said Arthur, “but I’m not sure it’s helped.
Very cool to see a graphic I sponsored in the same video that featured the Weber garden, which I walked passed every day in undergrad 😂 Loved the video and loved learning the lore behind the UMD landmark
THANK YOU! I absolutely love being able to chew on these thoughts that I've rarely heard of and can barely understand the implications of (seriously). But the thought that "lost" information is simply in a new format inside of a black hole is extremely promising and interesting if you consider the thought of ALL information eventually being lost to black holes. Makes me think of disk/data compression as a form of gravity, and changing from a spinning HDD to a solid state drive as similar to passing information through a digital black hole- gone from the HD (or preserved in its last existing state as a backup/memory) and proceeding in a new storage format. I know it's nowhere near the same, but, helps me try to simplify it into more familiar concepts, I suppose.
I will forever wish to be smart enough to study and learn this stuff, it is fascinating. Until then - thanks SciShow for making cool information easily digestible for us normies 👍🏼
@@NotesByNiba You're very welcome! Can I just say you do three things well here : 1) Reading the script in a natural conversational tone. 2) Using hand gestures to emphasize points and add movement to the shot...girl you put on a clinic on how it's done! Never repetitive but also not distracting from the words being said, just perfect. 3) The way you maintain eye contact throughout makes it again feel like a natural conversation, as opposed to a dry lecture. Have a great day, and best wishes on your career!
Black holes also have a Charge, so it's Mass, Spin, and Charge Not that I've ever seen mention of charge besides vague attempts to explain hawking radiation But apparently the math says so
Charge doesn't usually get mentioned because the positives and negatives tend to cancel out. A black hole with significant charge (relative to its mass) wouldn't stay that way for long, because it would attract opposite charges and be neutralized.
you are a really good presenter. I never know what to do with my hands and feel like i'm moving them too much but you lean into it well.. .I'm going to try to emulate that.
The universe “remembering” the past through gravity waves is like reconstructing a painting after it was burned. Yes you have some information in the ash but some information is (currently) beyond our technology to decipher. There’s a whole lot of analogies being made here. Hopefully viewers don’t misunderstand this. The universe doesn’t actually have a memory as it doesn’t think. This is about reconstructing the past.
Interestingly enough, I see history as a collective memory. You could say that history doesn’t “think”, yet it is still a memory of what has occurred through all those who can decipher the imprints. Instinct itself, is a form of unconscious memory. It can become conscious through introspection, reflection, contemplation, but it is an impact that exists, influences, and inclines that which it affects regardless of our acknowledgment of it.
Nah. We can do a lot with the cosmic gravitational wave background-that’s why we spent so long measuring it with Fermi. We might not be able to reconstruct everything (thanks quantum mechanics) but we can still see even further back than with the cosmic microwave background, and observe signals from sources LISA and LIGO aren’t sensitive to
I think the word memory could unintentionally give off a displacement (no pun intended) of the actual scenario of what the universe does in response to gravitational phenomena. Like your painting analogy, I would see it as no different than understanding fossils in their original forms, then those in their organic states. It's more like piecing together a record made of natural information rather than empirical information via sensory experience, like archeological, palaeontologic, or anthropologic records and so on. We can look at this process as being of natural history more than just astrophysics and theoretical physics. Even the consideration of using black holes in finding gravitational records is synonymous with the nature of how black holes result of Hawking radiation, and it's relationship with quantum gravity, looking deeper into the records of how gravitational signatures are displaced and left behind in the universe.
The odd shape we detect space as being after a gravitational wave is not the result of just that single wave. The state it was in BEFORE our test was the result of the state it was left in from the previous gravitational interactions BEFORE our observation.
Going by their premise, it would seem logical that each grav wave would modify space time. So yes, how would they disentangle all the different modifications that have happened through time? Going by their analogy, are they implying that you can look at a lake and determine all the times a pebble was thrown into it? And where it was thrown?
in a metaphorical sense, everything we do has an impact, leaving traces in the form of consequences, effects on the environment, and influences on those around us
Brb, advocating for RAM to be changed to RAI Less cheekily, memory has many definitions. Language isn't a rigid thing whose purpose is to conform to rules derived from the observation of it (that's putting the cart before the horse). Its purpose is to communicate, and I'd wager most understand what the title is trying to convey: not a consciousness but a medium by which there is a record (of sorts) of past events.
It's tough to comprehend what the universe is when you actually start considering we are it witnessing itself. We get seemingly working math to work out universal constants that are just arbitrary values (with profound importance for the stability of our reality, I understand). We have the ability to ask and possibly answer any and every question. *like the universe wants something from us* Science needs to be correlating how consciousness and memory work with quantum dynamics and our understanding of reality as a *Social Necessity* so that we can both understand ourselves and how this universe works
memory as in storage of information, it's why roulette wheels are always random, the system stores no information about it's previous states, so is not affecteed by them in any way and hence each outcome is random and every number erqually likely with each spin
Absolutely fascinating. Wish I could go back to school and become an astrophysicist! Thank you for your energy Niba! Need to see you more... You explained it so well so thank you to the writer(s) and you for your energy and apparent excitement. Much love to SciShow!
The difficulty in understanding "spacetime" - and really get an idea how that could be possible explanation of anything? - was beyond my capabilities until I reasoned: 1. A straight line is "kinda" defined by the way light moves. 2. Light has energy can rotate a small device called Crookes Radiometer. Photons have an ultraminuscule kind of mass. 3. Light has no time. It "kinda" defines time, but if you ride a photon you will not experience time (they say, the knowledgeable guys 😅did they try?) When taking these things into my inner universe I can suddenly see why gravitation bends light. I can also see that curving the space is a nice explanation to why gravity is a thing - but honestly, at that point I jump off, with all due respect, I don't think that is the reason for gravity (as if there need to be a reason at all).
What if I am right ... ? it does not mean that science as presented here is wrong, it is mostly the words and analogies I fear will misguide people like my younger self.
I remember the first time I learned light from other stars could be very old depending on their distance. My immediate thought was that looking at the earth light from our star obviously reflects back into space, so to someone far away we might look like a dinosaur planet still. My next thought was could we find a reflection of that light and zoom in for a video of our past. Sadly this isnt likely, but it did spark an interest in space.
Got me thinking. Might an object massive enough moving 'that-a-way' fast enough leave a "wake" in spacetime that LIGO or LISA or other like them could detect?
At the risk of demonstrating that I didn't understand this, I wonder if looking at the universe's memory, should it become possible, could reveal what happened in historical events or crimes...
I always thought GWs were caused by the movement of objects, since the change in their gravitational influence propagates at the speed of light. That's not a GW apparently, and GWs are caused by acceleration, not just movement.
What exactly is being measured to find gravity waves? Last I heard gravitons were still theoretical. So what exactly is being measured to detect a gravity wave?
I did see a dinosaur sneeze (many times). I have two pet parrots, and birds are dinosaurs. I've seen my parrots sneeze a number of times. (Interesting video, by the way!) 😉😉
What I don't understand is everyone claims when something goes into a black hole it continues on past the event horizon, but as things accelerate to the speed of light, time essentially stops... so the only way for them to go past the event horizon is for an infinite amount of time to pass in the rest of the universe... so shouldn't all the information of what went in to a black hole basically just hang out at the event horizon until the end of time?
From an observer's point of view, yes. But that information would be redshifted into infinity. And also two-dimensional, like the shadow of a 3D object projected onto a surface. To my understanding anyways. I'd imagine at some point it becomes impossible to distinguish from noise.
Makes sense because as gravitational waves expand they lose energy to space so they leave a lasting change on the space they move through. The energy must go somewhere if not conserved within them.
Actually it just spreads out, diluting constantly and inversely squared due to the 3 dimensions of our universe. it does not leave any energy "behind", the bubble expands and passes through spacetime.
2:53 welp that the weirdest unvers behavior ever then, there is ever lasting grove of gravitation in space-time? so how weird would it be to be on one of those grove where a black hole once was? would it be noticeable?
Think about if it were multiple paths, intersecting, and one of them was where a black hole, there would be a "parsing" of gravitational wave "residue".. yes it would be noticeable, and it would be obvious what happened inside the black hole, and surrounding it, it could backtrack all the way to and potentially past the cosmic background radiation.
Before the wave passes you, its energy is on one side. After it passes you, its energy is on the opposite side. Since energy produces gravity, that's a permanent shift in the total gravitational field around you. ...or at least I think so. It's a guess really. Hard to believe that effect is measurable.
The universe has a memory. And it will remember *that event.* When you ask it will say "it's fine." BUT make you sleep on the couch when you least expect it. 🤷♂️🤦♂️😂
If you don’t know ground level, how would you see the displacement? wouldn’t this limit reading the ‘memory’ to from the first LIGO measurements on (don’t even know if this question makes sense)?
The Universe remembering all this meanwhile I do not even remember what month it is
(September.)
@@General12th which year?
@@NorthernBanshee 2020 probably...
Its like it was yesterday
Why did I enter the kitchen?
It was May like yesterday
I never was much of a science student, my strength was more in the humanities. Today, you helped me to understand what i never understood before. Thank you very much!
you're so very welcome!
Guys, can you believe we get to live in this universe! The fabric of space is tattooed with its own history, like a sidewalk with faint impressions of autumn leaves that landed when the concrete was first poured. Top tier universe, really great work!
Thank you for that beautiful analogy : )
What a lyrical way to explain it. 🤗
Can't wait for the next update tho!!!
That’s a beautifully poetic way to express awe about the universe! imagine what other wonders and mysteries are out there waiting to be discovered
It takes a writer to know one. If you aren't a writer now, you will be 🤜🤛
So just by existing, you mean to say I have already left a lasting mark on the universe? Like, even if no one remembers me or the things I've done over my lifetime, the universe itself will always remember me? That is incredibly comforting.
Is it comforting? Or is it like discovering we have the existential equivalence to a browser history?
Never have I understand people's need to leave their mark in history. I think we would all be better off without the need to somehow make history remember you
💖
@@josephdooley981it's almost like we're social animals that crave closeness to others, and the idea that one might still be remembered and spoken of fondly after their passing is a part of that.
Youre weird.
@@josephdooley981 it's just sad that things might disappear forever isnt it, especially things you've put a lot of care into
RIP Scishow Space! I still miss you! Buuuutt...... great job as always, Niba! You are an awesome presenter! Much love! ♥♥♥
¥¿
Have they stopped making it?
@@Lewis94UA-camYes. They started uploading videos on this channel.
No scishow space or pysch anymore but now we have crash course religion because the world needs more religion and less science /s
Yes, I'm in love.
Niba did such an excellent job! I love the little comments and expressions she brought to the video. Look for ward to seeing more of her!
🥹🥹🥹 thank you!
All aboard the Niba appreciation train!
@@Svnipni 🚂〜(꒪꒳꒪)〜
Chocolate cutie 🍫💝🥺
@@arcan762 wtf that was weird
She is so lovely, some people have a positive vibe to them ☺️
That's not appropriate dude@@arcan762
Hairy Black Holes is my new favorite girl punk band
Hairy Black Holes are tight! À la Ryan George. 🤣
LMAOOO
Could it please share? I cannot remember S#@%!
Same. I’m 19, but feel like I have the memory of a 90 year old.
@@Raven17729 You think you've got problems ! I'm 80!
Delighted by how this video made complicated physics easily understandable. Fascinating to learn that the universe essentially has a "memory" and the potential this bears for uncovering the universe's enormous mysteries.
She has a great voice for this. She could 100% read audio books.
True, but the sound is shockingly bad.
@@sCiphre
I think it is her. Too sibilant.
@@EthelredHardrede-nz8yv no, you can setup the system to not get dynamically limited like that.
But her hand motions are super contrived, exaggerated, and distracting. It’s like the dubbed Japanese early Godzilla movies. 😂 She’s ruining her natural skill and beauty. Listening to an audio book would work better, I had to look away and try to just listen. It’s like someone giving a presidential speech and also trying to win the silly-face Olympics at the same time. It just doesn’t work. 😂❤
🥹🥹🥹 thank you! that's so kind!
@NotesbyNiba is by far the best presenter on UA-cam. And I've seen many well-presented videos in the past decade-and-a-half. Exceptionally communicated science.
🥹🥹🥹 that is so kind of you!
This is the first time I've heard the public definition of "gravitational eddies" that has been a hallmark of Star Trek shows for decades: Great introduction to the science of gravitational-interferometry after LISA goes online! I'd like to be a student!
“Eddies,” said Ford, “in the space-time continuum.”
“Ah,” nodded Arthur, “is he? Is he?” He pushed his hands into the pocket of his dressing gown and looked knowledgeably into the distance.
“What?” said Ford.
“Er, who,” said Arthur, “is Eddy, then, exactly?”
Ford looked angrily at him.
“Will you listen?” he snapped.
“I have been listening,” said Arthur, “but I’m not sure it’s helped.
Thank goodness for CrashCourse: The Universe! I surprised myself by already knowing a little bit about all of what you spoke on today.
Great video. Informative. Accessible. The presenter is excellent
I love her voice it’s pleasant to listen to.
🥹🥹🥹 thank you!
She might just be the one of the best hosts! Would love to see more of her!
🥹🥹🥹 thank you!
One of the most, on point reporting and explanation, of a significant subject, in this platform's offerings, so far. Top shelf, SciShow stuff!!!
Very cool to see a graphic I sponsored in the same video that featured the Weber garden, which I walked passed every day in undergrad 😂 Loved the video and loved learning the lore behind the UMD landmark
Really great episode! Fascinating
Seeing Niba as a host gives me joy!
THANK YOU! I absolutely love being able to chew on these thoughts that I've rarely heard of and can barely understand the implications of (seriously). But the thought that "lost" information is simply in a new format inside of a black hole is extremely promising and interesting if you consider the thought of ALL information eventually being lost to black holes.
Makes me think of disk/data compression as a form of gravity, and changing from a spinning HDD to a solid state drive as similar to passing information through a digital black hole- gone from the HD (or preserved in its last existing state as a backup/memory) and proceeding in a new storage format. I know it's nowhere near the same, but, helps me try to simplify it into more familiar concepts, I suppose.
This was very well done. Thank you
Her hands are totally creating gravitational waves.
Ricky Bobby should watch this, get some ideas
A lot of these people on various science channels do it. I often imagine them as power rangers posing with every word
And we are grateful for such a generous contribution to science
Haha, it's all my dance training coming to the front!
I will forever wish to be smart enough to study and learn this stuff, it is fascinating. Until then - thanks SciShow for making cool information easily digestible for us normies 👍🏼
iirc PBS spacetime did an episode a while back covering this to an extent!
love my two favorite science channels covering the same subjects!
I love PBS Spacetime, but it is the channel that most makes my brain feel inadequate 😅
Niba is crazy good at explaining things. I know the text is written for her, but the way she presented it was perfect. 🤔
🥹🥹🥹 thank you!
@@NotesByNiba You're very welcome! Can I just say you do three things well here : 1) Reading the script in a natural conversational tone. 2) Using hand gestures to emphasize points and add movement to the shot...girl you put on a clinic on how it's done! Never repetitive but also not distracting from the words being said, just perfect. 3) The way you maintain eye contact throughout makes it again feel like a natural conversation, as opposed to a dry lecture.
Have a great day, and best wishes on your career!
@@CaptainTedStryker wow, thank you for the detailed response! I appreciate it :D
Black holes also have a Charge, so it's Mass, Spin, and Charge
Not that I've ever seen mention of charge besides vague attempts to explain hawking radiation
But apparently the math says so
Charge doesn't usually get mentioned because the positives and negatives tend to cancel out. A black hole with significant charge (relative to its mass) wouldn't stay that way for long, because it would attract opposite charges and be neutralized.
Even so, a neutral charge is still an observable property and it should be mentioned.
Perhaps they are the subatomic particles for a much more massive universe? 🤯
you are a really good presenter. I never know what to do with my hands and feel like i'm moving them too much but you lean into it well.. .I'm going to try to emulate that.
🥹🥹🥹 thank you! It's my dance training
The universe “remembering” the past through gravity waves is like reconstructing a painting after it was burned. Yes you have some information in the ash but some information is (currently) beyond our technology to decipher. There’s a whole lot of analogies being made here. Hopefully viewers don’t misunderstand this. The universe doesn’t actually have a memory as it doesn’t think. This is about reconstructing the past.
Fair enough points - however, we talk commonly of "computer memory"; computers (at the moment at least) don't think anymore than spacetime does.
Cool.
Interestingly enough, I see history as a collective memory. You could say that history doesn’t “think”, yet it is still a memory of what has occurred through all those who can decipher the imprints. Instinct itself, is a form of unconscious memory. It can become conscious through introspection, reflection, contemplation, but it is an impact that exists, influences, and inclines that which it affects regardless of our acknowledgment of it.
Nah. We can do a lot with the cosmic gravitational wave background-that’s why we spent so long measuring it with Fermi. We might not be able to reconstruct everything (thanks quantum mechanics) but we can still see even further back than with the cosmic microwave background, and observe signals from sources LISA and LIGO aren’t sensitive to
I think the word memory could unintentionally give off a displacement (no pun intended) of the actual scenario of what the universe does in response to gravitational phenomena. Like your painting analogy, I would see it as no different than understanding fossils in their original forms, then those in their organic states. It's more like piecing together a record made of natural information rather than empirical information via sensory experience, like archeological, palaeontologic, or anthropologic records and so on. We can look at this process as being of natural history more than just astrophysics and theoretical physics. Even the consideration of using black holes in finding gravitational records is synonymous with the nature of how black holes result of Hawking radiation, and it's relationship with quantum gravity, looking deeper into the records of how gravitational signatures are displaced and left behind in the universe.
Niba, your videos are amazing.
The odd shape we detect space as being after a gravitational wave is not the result of just that single wave. The state it was in BEFORE our test was the result of the state it was left in from the previous gravitational interactions BEFORE our observation.
Going by their premise, it would seem logical that each grav wave would modify space time. So yes, how would they disentangle all the different modifications that have happened through time?
Going by their analogy, are they implying that you can look at a lake and determine all the times a pebble was thrown into it? And where it was thrown?
Fascinating info; love this channel!
What's great about science is it's constantly testing where it's wrong and what improvements our pool of knowledge need.
Great presentation 👍
Very interesting, thank you!
❤So well explained, thanks for the refreshing information, it's been 30+ years for me! Quite stripped indeed
So you're saying the universe will never forget all the embarrassing things we've all done, even long after we're gone? Great. Wonderful.
Check out the channel formscapes-
No, because you’re not massive enough.
However your momma is a different story.
@@gotbrady everything has gravity bud, even your shrimpy
@@harmonichaoticart😂😂😂
in a metaphorical sense, everything we do has an impact, leaving traces in the form of consequences, effects on the environment, and influences on those around us
Good video! Thanks for posting!!
That was brilliant. . Thank you
Great presentation too . . 👍😁
Now where is my pencil and paper . . 🤣😁
This seems like something that (on first glance) would be more of an imprint than a conscious memory.
I agree, then started thinking, what is an imprint if not a memory? Thanks for the brainfood 👍.
Brb, advocating for RAM to be changed to RAI
Less cheekily, memory has many definitions. Language isn't a rigid thing whose purpose is to conform to rules derived from the observation of it (that's putting the cart before the horse). Its purpose is to communicate, and I'd wager most understand what the title is trying to convey: not a consciousness but a medium by which there is a record (of sorts) of past events.
It's tough to comprehend what the universe is when you actually start considering we are it witnessing itself. We get seemingly working math to work out universal constants that are just arbitrary values (with profound importance for the stability of our reality, I understand). We have the ability to ask and possibly answer any and every question.
*like the universe wants something from us*
Science needs to be correlating how consciousness and memory work with quantum dynamics and our understanding of reality as a *Social Necessity* so that we can both understand ourselves and how this universe works
Tell that to believers of panpsychism
memory as in storage of information, it's why roulette wheels are always random, the system stores no information about it's previous states, so is not affecteed by them in any way and hence each outcome is random and every number erqually likely with each spin
Really great video, thanks
Thank you for absolutely blowing my mind that spacetime doesn't just return to its pre-wave conditions after a gravitational wave passes thru it 🤯🤓🥳
Amazing! I love this subject 👌🌠
I got heart eyes right after "Whether you're a paleon-" 🤷♂️
Presenter is fantastic
🥹🥹🥹 thank you!
Niba’s voice is so soothing!!
🥹🥹🥹 thank you!
Me: "Hey Lisa I heard you're going into space!"
Lisa: "Uhh, what?"
"we'll never see a dinosaur sneeze" Non-avian, maybe! Pretty easy to find footage of avian dinosaurs. :P
Amazing! 🤯💜
Absolutely fascinating. Wish I could go back to school and become an astrophysicist! Thank you for your energy Niba! Need to see you more... You explained it so well so thank you to the writer(s) and you for your energy and apparent excitement. Much love to SciShow!
🥹🥹🥹 thank you!
The difficulty in understanding "spacetime" - and really get an idea how that could be possible explanation of anything? - was beyond my capabilities until I reasoned:
1. A straight line is "kinda" defined by the way light moves.
2. Light has energy can rotate a small device called Crookes Radiometer. Photons have an ultraminuscule kind of mass.
3. Light has no time. It "kinda" defines time, but if you ride a photon you will not experience time (they say, the knowledgeable guys 😅did they try?)
When taking these things into my inner universe I can suddenly see why gravitation bends light. I can also see that curving the space is a nice explanation to why gravity is a thing - but honestly, at that point I jump off, with all due respect, I don't think that is the reason for gravity (as if there need to be a reason at all).
What if I am right ... ?
it does not mean that science as presented here is wrong, it is mostly the words and analogies I fear will misguide people like my younger self.
We miss SciShow Space. There are Presidents Of Space out there to fund you again!
I knew we were putting up space lasers to measure gravitational waves, but didn't realize they would be orbiting a Lagrange point. Neat!
This was cool
Wow this has a lot about gravitational waves I've never heard before in a lot of other videos.
Who can we thank for the fantastic thumbnail image?
Niba has a great voice and awesome facial + body interpretation of the text, please bring her more often🚀
Indigenous peoples have always known we are immersed in an awareness that is not our own. I recommend a philosopher named David Abram.
I remember the first time I learned light from other stars could be very old depending on their distance. My immediate thought was that looking at the earth light from our star obviously reflects back into space, so to someone far away we might look like a dinosaur planet still. My next thought was could we find a reflection of that light and zoom in for a video of our past. Sadly this isnt likely, but it did spark an interest in space.
I can't even imagine what these calculations must've looked like on paper.
Would decoding the information of a black hole require a universe sized computer and a universe sized measuring device?
Y'all got to the "information can't be destroyed" bit and all I could think from then on was "Donna Noble has been saved"
Hey, who turned out the lights?!
You go Niba!
This is my favourite SciShow host.
Got me thinking. Might an object massive enough moving 'that-a-way' fast enough leave a "wake" in spacetime that LIGO or LISA or other like them could detect?
At the risk of demonstrating that I didn't understand this, I wonder if looking at the universe's memory, should it become possible, could reveal what happened in historical events or crimes...
Good morning SciShow!
I always thought GWs were caused by the movement of objects, since the change in their gravitational influence propagates at the speed of light. That's not a GW apparently, and GWs are caused by acceleration, not just movement.
Yeah, it remembers that time in middle school when you spilled chocolate milk on your shirt in fron of the whole school
What exactly is being measured to find gravity waves?
Last I heard gravitons were still theoretical.
So what exactly is being measured to detect a gravity wave?
Lengths!
I did see a dinosaur sneeze (many times). I have two pet parrots, and birds are dinosaurs. I've seen my parrots sneeze a number of times. (Interesting video, by the way!) 😉😉
I will now forever be sad about not getting to see a real dino sneeze. I feel like it would be adorable.... at least from a very safe distance...
What dino?
say thank you, and I love you to the universe, in case it remembers.
theyre planning to build a gravitational wave detector in my region, hope they can follow through!! would love to work there if possible haha
What I don't understand is everyone claims when something goes into a black hole it continues on past the event horizon, but as things accelerate to the speed of light, time essentially stops... so the only way for them to go past the event horizon is for an infinite amount of time to pass in the rest of the universe... so shouldn't all the information of what went in to a black hole basically just hang out at the event horizon until the end of time?
From an observer's point of view, yes. But that information would be redshifted into infinity. And also two-dimensional, like the shadow of a 3D object projected onto a surface. To my understanding anyways. I'd imagine at some point it becomes impossible to distinguish from noise.
Thank you Niba!
Makes sense because as gravitational waves expand they lose energy to space so they leave a lasting change on the space they move through. The energy must go somewhere if not conserved within them.
Actually it just spreads out, diluting constantly and inversely squared due to the 3 dimensions of our universe. it does not leave any energy "behind", the bubble expands and passes through spacetime.
What exactly is being measured to detect a gravity wave?
@@lazyfoxplays8503lasers going slightly out of phase with one another when space ripples
What the hell is gravity?
So the Universe has stretch marks too... that's reassuring ☺
You lost me talking about black hole hair styles 😅
Why does this feel like forbidden knowledge?
You bet it does. And although history does not repeat itself, it does often rhyme.
If Blackholes have hair, Einstein was wrong.
I love this.
Oh no, I hope the Universe forgot what I did last summer...
Suddenly really bummed I'll never witness a real sauropod sneeze
i feel like my crystal homies would like this. really comforting how beautiful it is honestly.
2:53 welp that the weirdest unvers behavior ever then, there is ever lasting grove of gravitation in space-time? so how weird would it be to be on one of those grove where a black hole once was? would it be noticeable?
Think about if it were multiple paths, intersecting, and one of them was where a black hole, there would be a "parsing" of gravitational wave "residue".. yes it would be noticeable, and it would be obvious what happened inside the black hole, and surrounding it, it could backtrack all the way to and potentially past the cosmic background radiation.
Good, at least someone will remember me.
great video but i think you could have explained a bit more why spacetime itself permanently shifts
Stretching outwards?
…because everything is always moving in on itself?
Do consepts shift?
Before the wave passes you, its energy is on one side. After it passes you, its energy is on the opposite side. Since energy produces gravity, that's a permanent shift in the total gravitational field around you.
...or at least I think so. It's a guess really. Hard to believe that effect is measurable.
Crap, the Universe remembers when I crapped my pants!
We're still only scratching like a tiny percent of what the universe is
We'll never see a dinosaur sneeze not because of the properties of the universe, but because sneezing is not normal.
Underrated comment! 😂
I'm very much a believer in Information Theory. This is a wonderful thing to see.
It proves a soul if you go far enough. Kinda funny anyone could imagine anything else xD
I am not.
@@SernasHeptaDimesionalSpace The way they explain it is wrong but they are getting there dont you agree?
@@jaekae-u3k how? when you die your body doesnt just poof out of existance or something, its still around, just dead. no information is lost.
So what happens if this gravitational memory accumulates over very long time periods? Could it form a mechanism for a big crunch?
The universe has a memory.
And it will remember *that event.*
When you ask it will say "it's fine."
BUT make you sleep on the couch when you least expect it.
🤷♂️🤦♂️😂
Great presenter
Great video, thank you very much , note to self(nts) watched ……
I love this
i fell in love
If you don’t know ground level, how would you see the displacement? wouldn’t this limit reading the ‘memory’ to from the first LIGO measurements on (don’t even know if this question makes sense)?
You do know ground level... because you set the ground level by positioning the instruments before the wave hits.