I’ve been reading a book about anti-gravity. I just can’t put this thing down.
Gravity
Submitted 2 weeks ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/f5f9f458-3bb6-4dd1-bca3-604ed0ded7cd.jpeg
Comments
ODuffer@lemmy.world 2 weeks ago
tetris11@lemmy.ml 2 weeks ago
57k a year is a decent salary if you live in the UK.
A seasoned postdoc could expect to make 55K max. A professor a bit more.
Damage@feddit.it 2 weeks ago
57k€/year is a professional’s salary in Italy.
Average is 32k€
resting_parrot@sh.itjust.works 2 weeks ago
57k usd is a little less than 42k gbp
porous_grey_matter@lemmy.ml 2 weeks ago
Which is roughly the pay for a staff scientist or lecturer
dwindling7373@feddit.it 2 weeks ago
Well then I guess they don’t mean UK do they?
tetris11@lemmy.ml 2 weeks ago
If you think my comment was vacuous, you should see the ones that replied to it
porous_grey_matter@lemmy.ml 2 weeks ago
Postdocs are definitely not getting 55k in the UK except maybe if something like medicine is special? The range is like 36-45ish.
Steve@startrek.website 2 weeks ago
55k dollars in the US gets you a crappy apartment and a 7 year car loan.
Tollana1234567@lemmy.today 2 weeks ago
you dont even need a phd to get that 55k salary, might as well not go to grad school.
weed_scientist@mander.xyz 2 weeks ago
Can confirm
macaw_dean_settle@lemmy.world 2 weeks ago
That is not a decent salary, that is so low.
funkless_eck@sh.itjust.works 2 weeks ago
in the uk
is the important part. you would be considered a high earner earning that
Maxxie@lemmy.blahaj.zone 2 weeks ago
What do you mean no advances in the last 70 years?! In the last decade scientists detected gravity waves and imaged an actual real black hole. Also they’ve been steadily chipping at quantum gravity, give it a couple decades they’ll get there.
unless we cancel all the funding
anotherspinelessdem@lemmy.ml 2 weeks ago
unless we cancel all the funding
Just had to fucking jinx it didn’t you
saimen@feddit.org 2 weeks ago
Aren’t the first two things just experimental proves of Einsteins relativity theory from over 100 years ago?
I don’t know about quantum gravity though.
Maxxie@lemmy.blahaj.zone 2 weeks ago
I wouldn’t say “just”, experimental proof seems huge.
But if you want theories just go to PBS space time and open anything that isnt string theory or mond.
PlexSheep@infosec.pub 2 weeks ago
A theory proven is progress, don’t you think?
AlteredEgo@lemmy.ml 2 weeks ago
Gravity is just a side effect of the fundamental laziness of all things. Causality moves slower near mass, so it’s kind of relaxing to move towards it. That’s why everyone does it.
PS: There is actually a SciShow Spacetime video about gravity being an emergent property instead of a fundamental force. And no I didn’t get this from ChatGPT, I’m just that dumb when it comes to advanced physics haha.
SGforce@lemmy.ca 2 weeks ago
dil@hexbear.net 2 weeks ago
Oh hell yeah I love an emergent property. That’s my new favorite theory
_AutumnMoon_@lemmy.blahaj.zone 2 weeks ago
Gravity was invented by Isaac Newton because he was invested in an airline.
PartyAt15thAndSummit@lemmy.zip 2 weeks ago
That’s the real answer. Always check on whose payroll somebody is.
webghost0101@sopuli.xyz 2 weeks ago
Gravity is a fundamental force just like electromagnetism (supposedly)
Fundamental means it cannot be explained by being caused by something else.
But then they say gravity is an effect caused by spacetime curvature and electromagnetism is caused by quantum phenomena.
What is the cause for spacetime or quantummechanics? Idk but somehow they don’t make it on the list of fundamental forces.
Classical science, for all the good it did and does, is an unironic joke and if aliens knew about it they’d be laughing at us.
WolfLink@sh.itjust.works 2 weeks ago
Fundamental means it cannot be explained by being caused by something else.
Fundamental force means we expect a carrier particle to explain it (for gravity that’s the Graviton, although it hasn’t been detected yet).
electromagnetism is caused by quantum phenomena.
Not even remotely true.
What is the cause for spacetime or quantummechanics? Idk but somehow they don’t make it on the list of fundamental forces.
Quantum mechanics is mostly that statistics is more complicated than we all thought . Seeking a cause for spacetime is interesting. It might be relevant to mention that there is a fundamental particle that imparts mass, which we call the Higgs Boson. I guess that could make mass and inertia something of a “fundamental force”.
webghost0101@sopuli.xyz 2 weeks ago
Maybe i am wording it wrong. I did make the comment half joking but my current understanding of how magnetism really works, which my physics teacher was unable to answer has a chapter on wikipedia called Quantum-mechanical origin of magnetism
I have no degrees in this stuff though, i just think about them recreationally.
marcos@lemmy.world 2 weeks ago
What is the cause for spacetime or quantummechanics? Idk but somehow they don’t make it on the list of fundamental forces.
Well, they are not forces.
Kolanaki@pawb.social 2 weeks ago
But then they say gravity is an effect caused by spacetime curvature and electromagnetism is caused by quantum phenomena. What is the cause for spacetime or quantummechanics? Idk but somehow they don’t make it on the list of fundamental forces.
I don’t think we know enough about quantum mechanics to even make a guess, yet. I do know that the reason we wanted to find the Higgs Boson so much was because we thought it could help explain how things acquire mass, which could lead to figuring out antigravity. But then we found it and it wasn’t doing what was originally thought. Or something.
jenesaisquoi@feddit.org 2 weeks ago
electromagnetism is caused by quantum phenomena.
Lol what no
Zerush@lemmy.ml 2 weeks ago
It is what make it risky to jump from the Burj Kalifa, at least on the last meter.
match@pawb.social 2 weeks ago
And yet, jumping from the Burj Khalifa at 1m off the ground is not very dangerous, so it’s not the Burj Khalifa that’s doing it
dave@feddit.uk 2 weeks ago
And even if you jump from higher up, it’s the ground that does it, still not the Burj Khalifa.
Zerush@lemmy.ml 2 weeks ago
It’s not riky while you are falling from 800m, only at the end
nomecks@lemmy.wtf 2 weeks ago
Wouldn’t the strong nuclear force be what makes jumping from the Burj Khalifa dangerous? It’s not the fall that kills you, it’s the sudden stop.
Almacca@aussie.zone 2 weeks ago
I find it quite marvellous that the universe contains unexplainable stuff like this, actually.
LemmyFeed@lemmy.dbzer0.com 2 weeks ago
Everything we know about all space and time is technically just entirely made up by us.
Snowclone@lemmy.world 2 weeks ago
It came from the Labratory of The Mind, yes, the work was entirely metaphysical, but here’s the wierd part. They used that mental experimentation and applied it to real life action, and it worked. It’s like imagining you have a magic carpet for years then you stand on one and it starts flying. It began as imagination of the world around us, then when checked against reality. It works. Someone figured out that if something was passing around a sun. A planet, that it would dim the light at regular intervals. They checked, it did, that’s the only reason we know there’s planets outside our solar system. Someone checked the lumens of stars and found the data matched the theory. We use the color variations of stars in a similar way to detect more data. It’s quite remarkable. A recent discovery in gravity is that while gravity is a ‘‘constant’’, it actually fluctuates from place to place, I’m not sure if anyone figured out why yet, but if and when, how they find out, will be their imagining a reason, imagining how to check, checking in real life, and getting the data on if it’s right or not.
MotoAsh@lemmy.world 2 weeks ago
Made up, and then confirmed with experimentation against actual reality.
Let’s not pretend science is literature with extra steps. It’s a process whos aim is to confirm things in a way that removes all possible alternative explanation or influence. A good experiment completely and fully removes the human element.
saimen@feddit.org 2 weeks ago
There is an actual logical proof that there are propositions in mathematics that are neither provable nor refutable.
cows_are_underrated@feddit.org 2 weeks ago
Unexplainable yet. We may be able to understand how Gravity works.
But of course you are right, there are absolutely things that can not be explained. It is (very probably) impossible to explain why our nature constants are the way they are or why forces act the way they do. The easiest answer to why they are the way they are is to say “They are this way, because if they would be a little bit different we could not ask this question”. This sentence implies, that we live in some form of a multiversum and that there are multiple universes existent (in which form doesn’t matter) but it is impossible to detect them.
MotoAsh@lemmy.world 2 weeks ago
No, there actually are explanations for the effects as they exist in mathematical models. The problem is we do not yet have one single model that matches both quantum effects like superposition and cosmic scale effects like gravity and dark matter/energy.
There is almost certainly some truth in those mathematical explanations, simply because it’s unlikely that something that is 99.99% provably correct has no truth associated with it.
The problem is, it needs to be 100%, with proven and confirmed experiments, not 99.99% correct, before scientists will call it a “solved” problem.
GissaMittJobb@lemmy.ml 2 weeks ago
Mass go brrrr
SaharaMaleikuhm@feddit.org 2 weeks ago
Gravity is what makes my feet hurt when I stand around too long without moving about.
xx3rawr@sh.itjust.works 2 weeks ago
No, it’s pain receptors
buttnugget@lemmy.world 2 weeks ago
Gravity is pain receptors. Got it.
Snowclone@lemmy.world 2 weeks ago
The far end might sound smart to you if you’ve never taken physics classes, but…
Korhaka@sopuli.xyz 2 weeks ago
I mean for 57k a year it doesn’t sound too bad tbh.
Fredthefishlord@lemmy.blahaj.zone 2 weeks ago
I could buy a house with that much ~
macaw_dean_settle@lemmy.world 2 weeks ago
Apartments are rented, condos are bought.
skisnow@lemmy.ca 2 weeks ago
While reading this I had a sudden flash of inspiration in which I saw clearly exactly how gravity works, but then when I started typing I forgot again. It’s quite frustrating
I_am_10_squirrels@beehaw.org 2 weeks ago
Congratulations, here’s your PhD
nectar45@lemmy.zip 2 weeks ago
Daily reminder that physicists contribute nothing to society /j
erotador@lemmy.blahaj.zone 2 weeks ago
mavity
TimewornTraveler@lemmy.dbzer0.com 2 weeks ago
schmavity
buttnugget@lemmy.world 2 weeks ago
Lemmy: Hey, remember how reddit used to be so good?
Satan: Yeah! Dang, I miss those days.
Lemmy: I’ve got tons of what you don’t miss about reddit and little of what you do!
Satan: Hooray!
MotoAsh@lemmy.world 2 weeks ago
This is wholly inaccurate. We do know what causes gravity; time dilation near matter. What we don’t know is why gravity, because we have yet to produce a model that matches both quantum effects and cosmic behaviors like gravity and dark matter/energy.
“Quantum gravity” is the general term for figuring out something that ties these two universes of behavior together.
pcalau12i@lemmygrad.ml 2 weeks ago
For any physical theory, you can always just ask “why x”, like a child who constantly asks “why” over and over again to every answer, but you will always hit a bottom. There seems to be a popular mentality that “why x” is always a meaningful question, and from that, we can conclude that we don’t know anything at all, because all our beliefs rely on a “why x” we don’t know the answer to, an so they are all baseless. We can’t make any truth claims about the behavior of particles, galaxies, or anything, because you can just infinitely ask “why” until we hit a bottom and then you would say “I don’t know.”
But, personally, I find this point of view rather bizarre, because, again, it can make it seem like we don’t know anything at all and have no foundations for truth claims in the slightest, and are completely ignorant about everything. I think it makes more coherent sense to just allow for to be a bottom to the questioning. Eventually a string of “why” questions will reach a bottom, where that bottom shouldn’t be answered with “I don’t know” but it should be answered with “it is what it is,” because, for all we know, it is indeed an accurate description of reality at a fundamental level and there is nothing beneath it.
That shouldn’t be taken as a strong claim that there definitely isn’t anything beneath it, as if we should just accept our current most fundamental theories are the end of the line and stop searching. It should be taken as the weaker claim that as far as we currently know it is the bottom, and so we can indeed make truth claims upon that basis. The child might ask, “why do things experience gravity?” You might say, “time dilation near matter.” The child then may ask, “why does time dilate near matter?” In my opinion, the appropriate response to that is just, “as far as we know, it is what it is.” That could change in the future, but, given our best scientific models at the present moment, that is the end of the line of the explanation.
That seems to be a fairly controversial point, though. Most people in my experience disagree, but I don’t see how you can have a basis for truth claims at all if you claim that “why gravity” does indeed have an answer but you can’t specify it, because then it would also be baseless to claim that gravity is caused by time dilation near matter, because you’ve not established that time actually does dilate near matter, as you would be claiming that this relies on postulates which you’ve not defined. It seems, again, simpler to just take the most fundamental theories as the postulates themselves, as the fundamental axioms.
There is a popular point of view that we shouldn’t do this because scientific theories often change, so something you believe today can be proven wrong tomorrow. But then we end up never being allowed to believe anything at all. We always have to pretend we’re clueless about nature because if we believe in any of our most fundamental theories, then our beliefs could be overturned. But personally, I don’t see why this to be a problem. A person who believed Newtonian mechanics was fundamental to how nature worked back in the 1700s were shown later to be wrong, but that person’s beliefs were still closer to reality than the people who rejected it and upheld outdated Aristotelian physics, or people who refused to belief in anything at all. It is fine to later be shown to be wrong, nothing to be upset about, nothing negative about that. We are better off, imo, as treating our best physical theories as indeed fundamentally how reality works, the “bottom” so to speak, until we find new theories that show otherwise, and we change our minds with the times.
x00z@lemmy.world 2 weeks ago
Gravity is not what makes your body limp. It would just heavily influence a limp body. PhD my ass.
burgerpocalyse@lemmy.world 2 weeks ago
i know what gravity is, but i dont believe in it
Snowies@lemmy.zip 2 weeks ago
Gravity is the net effect of all electromagnetic forces and quantum fluctuations causing the smallest bits of information at the smallest scales to drift together over “time” due to black hole natural selection aka cosmic natural selection.
It is the universe using math to reproduce.
fox@hexbear.net 2 weeks ago
That’s crank nonsense unless you’re able to describe it with quantum electrodynamical equations that also accurately define gravity, and the whole point is that we cannot reconcile gravity and quantum physics yet.
Snowies@lemmy.zip 2 weeks ago
nuh uhhhh!!!
scrubbles@poptalk.scrubbles.tech 2 weeks ago
Same as any theory, but it’s enough to make Christians freak out
I_am_10_squirrels@beehaw.org 2 weeks ago
eVoLuTiOn is just a ThEoRy!
NerdInSuspenders@leminal.space 2 weeks ago
Isn’t this half the plot of Interstellar?
pisstoria@hexbear.net 2 weeks ago
gravity is at the very least a vibe
plinky@hexbear.net 2 weeks ago
is time even real? smh
ILikeBoobies@lemmy.ca 2 weeks ago
Gravity is how attracted I am to your mother
VitabytesDev@feddit.nl 2 weeks ago
Babe wake up new physics copypasta just dropped
AmbientDread@midwest.social 2 weeks ago
Gravity is the opposite of comedy.
danc4498@lemmy.world 2 weeks ago
I’d wait got the demonstration.
Kolanaki@pawb.social 2 weeks ago
Gravity is caused by the fact that everything in the universe sucks.
Theoriginalthon@lemmy.world 2 weeks ago
So what you are saying is micro black holes everywhere, thats genius!
I_am_10_squirrels@beehaw.org 2 weeks ago
And here I thought it was just your mom