/sci/ - Science & Math

would that mean that dark energy is like reverse gravity, since it is pulling dark matter up (up to us)?

>>7238751
Shouldn't it be anti-matter? Tought that anti-matter was the one who had anti-gravity.

Space-time doesn't exist if there is no matter or energy.

OP here. I'm a huge faggot.

What if yer aunty had baws?
She'd be yer uncle.

>>7238751
Just to clarify OP's stupidity for everyone:

Dark matter - has normal mass, does the same thing to space time as regular matter, we just can't see it
Antimatter - also normal mass, acts the exact same way, just has opposite charge
Exotic matter - this is what has "negative mass"; there's also no reason to believe it exists

>>7239384
Antimatter "just" has the opposite charge? Sure? Nothing more?

>>7239384
What is Exotic matter and why do many people believe in it?

>>7239394
appearantly theres probably some very minor differences.
people are trying hard to get onto it.
see, its very new.

>>7239394
I'm not going to delve into the post-physics 101 properties of dark matter here, I just don't want people to think it has negative mass. I suppose the fact it annihilates with matter could be considered a property too?

>>7239396
The only reason the term "exotic matter" exists is so we have a word for the idea of negative mass. There isn't anything we know of in the universe that might suggest exotic matter existing, I don't know why so many people think it must for some reason

>>7239403
because it existing would allow for instant sci-fi society

wishful thinking

>>7239384
So this is bullshit right

>>7239432
Oh shit, my bad, didn't understand what i was fucking reading.

>>7239350
No. Antimatter interacts with the electromagnetic field in the opposite way, no difference in the gravitational field.

>>7238760
This is a surprisingly not-crazy thing to read in a thread that looked like it would be such bullshit.

Dark Energy could indeed be thought of like "reverse gravity." In fact, some cosmologists think that there is no such thing as dark energy and that the best explanation for the laws of gravity that we know, Einstein's Theory of General Relativity, is simply incomplete. This isn't even hard to believe, because most physicists think that General Relativity will be replaced by a quantum theory of gravity someday.

Dark Energy could also be a force, a property of the vacuum, or something no one has thought of yet.

The main problem with OP's theory is that it explains the properties of the universe through curvature of spacetime. We don't need a mass on the "other side" of spacetime to give it a negative curvature. But it's a moot point, because space, on the whole, isn't curved anyway. It is in fact very flat, like OP's picture, almost everywhere (except for very close to very heavy things, but then it flattens out away from them). Yet, the expansion of space is still accelerating. Hence, dark energy, conceived in the same way as what was once just called the cosmological constant.

>>7239384
You seem very knowledgeable.

Does Exotic Matter fit in a healthy diet?
Will I gain weight?
What if I add Dark Matter in my Milky Way?

>>7239403
It's a solution for the source of the cosmological constant. It probably doesn't exist, but we can't ignore one of our few solutions to that problem.

I know this is a bit played out of a response to things like this as it already stands, but if you're believing in concepts like 'on the other side of spacetime', why wouldn't you believe in God?

The two things are 100% logically equivalent.

>infantile drivel about open questions in physics by people who have more than likely not even taken calc 2 yet

*thread hidden*

>>7240239
This.
These sort of threads are the cancer killing /sci/. This is so fucking inane that I can't even properly shitpost.

interesting hypothesis. can you provide a way to disprove it, or devise an experiment that will show a predicted result of this hypothesis is true? if not, your just spinning a fairy story, like all religion

>>7239662
>no difference in the gravitational field.
citation needed. We actually havent verified this through experiment because we cant make enough anti-matter to measure gravitys effect on it.

>>7239384
>Antimatter - also normal mass, acts the exact same way, just has opposite charge
citation needed, this has not been experimentally verified.

>Exotic matter - this is what has "negative mass"; there's also no reason to believe it exists
The equations heavily imply that it does exist. However I agree that right now there is no reason to say one way or another on whether or not exotic matter exists.

>>7240435
>We actually havent verified this
citation needed
>>7240440
samefag retard

inb4 what is a particle accelerator, inb4 what is acceleration, inb4 what is gravity. fucking retards these days.

>>7240440
https://en.wikipedia.org/wiki/Antimatter
inb4 what is reading

>>7238751
lol funny thought universe would look like swiss chees

There is no such thing as a "space time fabric"

Spacetime is not a thing like water or air, it's a mathematical model space and time into a single concept.

We don't exist in spacetime, we think in spacetime.

>>7240161
>What if I add Dark Matter in my Milky Way?
don't do it anon-kun, it will make milky-chan all fat and slow!

>>7240845

>we don't think in spacetime, we are spacetime.

>>7240919
>we don't think in spacetime, spacetime thinks we