Space and physics question

danbot said:
Plenty of people believe the earth is flat.
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Lol funny that you say that.
There's a good chance that it is!
It's a trending theory that everything...even space itself... is just a 3D hologram..made from information smeered on a 2D plane.
 
Mmm390 said:
Lol funny that you say that.
There's a good chance that it is!
It's a trending theory that everything...even space itself... is just a 3D hologram..made from information smeered on a 2D plane.
Click to expand...
I don't know how good of a chance it is, but it's an interesting theory.
 
I think it might help to understand how/why C is constant. Which I don't.

I'm standing here, you turn on a spotlight, shining it past me. The light goes past me at the speed of light.

I get in my trusty rocket, and I take off thataway. It's a fast rocket, travels at half the speed of light. You stay on terra firma and shine the spotlight past my rocket as I flyyyyy aaawwwaaaayy yeah. (Sorry, I can't sing very well).

At what speed does the light go past me and my trusty rocket?

The laws of physics are the same for any frame of reference in uniform motion.

The 3D hologram thing, fascinating idea, well beyond me at this point though.
 
:)
The concept being explored is described by "world lines" in special and general relativity which is basically how light travels in 4 dimensional Minkowski Space which after Einstein is called Spacetime. You are looking "back in time" only because the light you see has been travelling at the speed of light for so long it is only now reaching your eyes from where it originated and you see the event that originated it. You cannot see into the future, as it were, because that would involve seeing something, photons, that haven't reached your eye or sensors yet, which is what we define as "seeing".
Now in quantum physics there is a way around this in a small scale because mathematically, as Feynman showed, in some respects there's no dfference between matter going backward in time or antimatter going forward in time.

Does time exist? Well, it's a useful concept in most of the equations we use but interestingly some can be independent of time and some wierd ones might even have more than one kind of time; but in general it is a very useful concept that we haven't been able to do without and that accords with our everyday experience.

The black hole is fascinating and hard to understand without the math. General relativity says, as was correctly pointed out here, that the observer from a different frame of reference won't see a traveller pass the event horizon although the traveller will. Two apparently contradictory calculations say the event horizon will be so hot the traveller will burn up and sublimate while another says he won't notice a thing. A typical quantum mechanics complementarity type mind bender.

The holograph thing is really wierd and I'll comment on that next when I get back.
 
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Two giants had an argument and made the customary $1 bet, Hawking and Susskind. Hawking lost this one.
The most fundamental law of physics isn't conservation of matter or energy, it's conservation of information.
Hawking bet information was lost in a black hole because it gets annihilated in the centre, called a "singularity" where everything goes infinite, you divide by zero and physics breaks down. But as it turns out, information can escape in the form of Hawking radiation which is basically one partner of a vitual particle pair going into the black hole and the other bouncing away from the event horizon. The last paper Hawking published ( with others ) is how information can be encoded in Hawking radiation. I understood that one. Anyway, Susskind, Beckenstein ( and others) showed how entropy is proportionate to the area of the event horizon and how information about the stuff in the black hole is basically saved forever on the event horizon in 2 dimensions until it escapes in Hawking radiation. The universe as a hologram is a bit much for me, but the pointy heads have gone there.

The current cutting edge is Ed Witten's version of Superstring theory and Supergravity called M theory. That math is so far over my head I basically have to take their word for it. I have looked at these equations like a monkey looking at a computer for all the good it does me
 
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HJK...
You're my kind of people! Lol
Thank you for answering my questions.
I wouldn't consider myself an "educated" person in any field of science.
College astronomy 101 is as far as my formal astrophysics education goes.
But science and space are one of my passions and I spend a couple hours almost every night catching up on the latest space news, theories, etc.

Some of the most interesting to me at this time are...
The possibility that the supermassive black holes at the centers of most or all galaxies are actually wormholes.
Evidence being the unusual movement of stars orbiting our "SMBH"
The theory goes that these unusual orbits could be explained by gravity of other stars traveling through the wormhole and changing the orbits of the stars on our side. We should have an answer within 10 years.
Other evidence is filaments connecting galaxies to eachother.
But this could also be dark matter.

Fast radio bursts are something I also check up on daily....
But FRBs have so many theories at this point I don't know what to think. I'm leaning towards it's something natural...not artificial.
Probably envolving a magnatar or black hole.

Quantum entanglement or "spooky action at a distance" is another great one.
Trying to grasp this one gives me a headache. But from what i understand it's great evidence for string theory.

Dark matter is a good one. I think black holes have something to do with its creation. Black holes can be considered a type of dark matter...but I don't think they are THE dark matter everyone is looking for.

The possibility that were living inside a blackhole is another good one.
I'm not fimiliar with the math. But from what i understand...the possibility hasn't been ruled out and could in fact explain a lot of questions we don't have answers for. Such as dark energy.
Maybe the universe is expanding at an increasing rate because we are getting closer to the event horizon or singularity

And my list goes on and on.
I love this stuff
 
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I also have this theory about M87s super massive black hole and other intelligent life.
M87s black hole and its massive jets are the undisputed heavy weight of our region of the universe. And it just so happens that one of its massive jets is almost pointed directly at us....like a huuge arrow.

Wouldn't any other intelligent life out there want to study its massive jets and the regions around it? Since its pointed almost directly us wouldn't that greatly increase our odds of being spotted by other intelligent life?
 
Mmm390 said:
Ok that makes sense.
So if I traveled towards you...your image would seem to fast forward ...and traveling away you would slow down. Correct?

So the only way to get past this fast forward and slowing down effect would be to travel through a wormhole...if they exist.

If 2 objects with optical sensors are traveling towards eachother close to the speed of light what would they see?
Click to expand...

They would see the historical image as it arrives at their location.

n2s
 
Mmm390 said:
HJK...
You're my kind of people! Lol
Thank you for answering my questions.
I wouldn't consider myself an "educated" person in any field of science.
But science and space are one of my passions and I spend a couple hours almost every night catching up on the latest space news, theories, etc.

Some of the most interesting to me at this time are...
The possibility that the supermassive black holes at the centers of most or all galaxies are actually wormholes.
Evidence being the unusual movement of stars orbiting our "SMBH"
The theory goes that these unusual orbits could be explained by gravity of other stars traveling through the wormhole and changing the orbits of the stars on our side. We should have an answer within 10 years.
Other evidence is filaments connecting galaxies to eachother.
But this could also be dark matter.

Fast radio bursts are something I also check up on daily....
But FRBs have so many theories at this point I don't know what to think. I'm leaning towards it's something natural...not artificial.
Probably envolving a magnatar or black hole.

Quantum entanglement or "spooky action at a distance" is another great one.
Trying to grasp this one gives me a headache. But from what i understand it's great evidence for string theory.

Dark matter is a good one. I think black holes have something to do with its creation. Black holes can be considered a type of dark matter...but I don't think they are THE dark matter everyone is looking for.

The possibility that were living inside a blackhole is another good one.
I'm not fimiliar with the math. But from what i understand...the possibility hasn't been ruled out and could in fact explain a lot of questions we don't have answers for. Such as dark energy.
Maybe the universe is expanding at an increasing rate because we are getting closer to the event horizon or singularity

And my list goes on and on.
I love this stuff
Click to expand...
All fascinating stuff.
What happens at the centre of a black whole ie the "singularity"? Nobody knows. Wormwhole to another universe? Inter-universal tollbooth?
It'll take another Einstein or two.

Speaking of Uncle Albert, for me the wierdest and most promising thing is Quantum Entanglement, which Einstein called Spooky Action At A Distance.
He said it had to be nonsense and with Podlosky and Rosen proposed an experiment to disprove it, and sonofagun thanks to Bell and others they did the test and PROVED it! It's the basis of quantum computers and promises faster than light things, teleportation etc.
Bear with me on this for a second as I outline it super briefly.

Particles ( which are simultaneously waves ) have "Spin" and the ones we are concerned with can be +1/2 or -1/2. Say you have two of these particles each with different spin, which is a pair. Shoot them off in opposite directions. Now quantum mechanics has something called superposition of states that famously is behind Schrödingers cat that is alive and dead at the same time, until you open the box and look ie a particle has 1/2 ans -1'2 spin at the same time until you look and crystallize the state in our frame of reference to one or the other. Schrodinger proposed that to show it was absurd but like Einstein he actually demonstrated the effect. Anyway, the classical understanding is that you determine the state of the particle or cat just by looking and until then it is a combination of potentials. So, Einstein said, what happens if you don't open the box until the particles are so far apart it would take light measureable time to travel the distance? Since nothing goes faster than light, particle A can't influence particle B instantaneously and there is no mechanism for A to influence B so that it knows what spin the other one has to determine what spin it should have ie spooky action at a distance. But sonofagun, it actually does. Somehow these two particles are linked and do "communicate" faster than light, instantaneously, regardless of distance. The particles are said to be "entangled". A quantum computer uses this ( instead of 0 and 1 yet get 0/1, 0, 1 and instantaneous communication).

Now Einstein was f'ing smart, obviously. He said nu, uh ( or the equivalent in German ): obviously the particle is already 1/2 or - 1/2 and you aren't crytallizing anything just saying, aha it's 1/2 so the other is already -1/2; but he spent his life trying to prove that and his thought experiments culminating in Podlosky Rosen pushed the other geniuses like Bohr to their limits to answer him, but ultimately ( so far ) it seems Albert was wrong- but even being wrong he pushed everyone much further to refine the theory and voila, quantum entanglement's possibilities are now a reality.

NOBODY understands it. Feynman, Nobel oprize winner and renowned as the best teacher of physics ever, simply said that if you think you understand it then you clearly do not understand it.

There is a next level that might unlock the mysteries, M Theory ie superstring Theory and Supergravity, and the current super genius is Ed Witten.
I understand it in general terms but not the math, which means I don't understand it at all because it's all about the math. Witten says we've stumbled onto a new theory that we don't understand yet and only see the tip of the iceberg. I watched the guy use the theory to derive general relativity! so it's the real thing with incredible promise, but nobody is smart enough to do an Einstein with it, not even Witten and he's very scary brilliant.

Me? I like knives!
 
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mm390 said: ↑
Ok that makes sense.
So if I traveled towards you...your image would seem to fast forward ...and traveling away you would slow down. Correct?

Oopsie. The speed of light is constant and does not speed up as you approach it. But time and space will change instead. Special Relativity.
 
Mmm390 made me think of "astral projection" or (OBE) out of body experience. People say they can see into the future. I myself have not. It's all done through meditation practices, this really fascinates me. I'm first, a spiritual being having a human experience.
 
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HJK said:
I think some of the more extreme theories are mental.
There's a difference between math and actual science.
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My issue with science is, we don't know what we don't know. This is the smallest particle, no now this is the smallest particles. We just keep evolving. What is once only imagined is now real.
I believe we are creators, we create the reality we want. I'm not debating you, just my 10 cents cause my two cents are free. Lol. Yeh it's different, I'd rather have people dislike me for who I am, than like me for who I'm not.

https://en.m.wikipedia.org/wiki/Timeline_of_particle_discoveries
 
One of my favorite quotes...

"What I can not create...I do not understand"

But that doesn't mean we shouldn't try to understand
 
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You earth people haven't a clue. WE put you in the dream state when your world began to sublimate almost 20, 000 years ago. We inject mental bits into the fluid that surrounds you brain sac. ... My partner says I have said too much already. I must beam back up. Wiedersehen as you say.
 
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