How big is the universe?

[IceCrash]

indeed
my opinion is, we aren't able to understand another dimension, we're stuck with this body.. it's something that, as far as we know, doesn't give us the "freedom" we want.

It'd be interesting thought, if we'd be able to manage something via "matrix-style", idk..

[NuclearSilo]

The universe is infinite. It will keep expanding forever.

If smt could expand => It has a limit, an edge => the universe is finite => you contradict yourself.

On topic: it's as big as your imagination is

Actually if the universe is infinite it is, because it will expand forever but it does have a limit at one time but then another the edge isn't there, it is a very confusing event. But some scientist say the universe expands and contracts over time, we just don't know yet

If it has an edge and it expands, it means that it is finite
If it has no edge but it still expands, it means that the affirmation is false:
by definition, expand(x) => sizeof(x_final) - sizeof(x_initial) >= 0
assuming the universe is infinite:
initial state: A = sizeof(x_ini) = ∞
final state: B = sizeof(x_fin) = ∞
∞ + d = ∞ (d>=0)
=> A = B = ∞
=> B - A = 0 => sizeof(x_fin) - sizeof(x_ini) = 0 => the universe doesn't expand

If it has an edge but you can't see it nor touch it, by definition of "existence", smt exists only if you can use any of your 5 senses to feel it.
=> it doesn't have an edge

indeed
my opinion is, we aren't able to understand another dimension, we're stuck with this body.. it's something that, as far as we know, doesn't give us the "freedom" we want.

It'd be interesting thought, if we'd be able to manage something via "matrix-style", idk..

If you try "astral travelling", not only you'd be able to get your "freedom", but also you'd be able to cross through space and dimension.

[IceCrash]

indeed
my opinion is, we aren't able to understand another dimension, we're stuck with this body.. it's something that, as far as we know, doesn't give us the "freedom" we want.

It'd be interesting thought, if we'd be able to manage something via "matrix-style", idk..

If you try "astral travelling", not only you'd be able to get your "freedom", but also you'd be able to cross through space and dimension.

interesting
how?

[Sav]

Actually if the universe is infinite it is, because it will expand forever but it does have a limit at one time but then another the edge isn't there, it is a very confusing event. But some scientist say the universe expands and contracts over time, we just don't know yet

If it has an edge and it expands, it means that it is finite
If it has no edge but it still expands, it means that the affirmation is false:
by definition, expand(x) => sizeof(x_final) - sizeof(x_initial) >= 0
assuming the universe is infinite:
initial state: A = sizeof(x_ini) = ∞ according to the most accepted theory (big bang), the universe was compressed(?) equivalent to the size of a grain of rice (or smaller), so Xi =/= Xf
final state: B = sizeof(x_fin) = ∞
∞ + d = ∞ (d>=0)
=> A = B = ∞
=> B - A = 0 => sizeof(x_fin) - sizeof(x_ini) = 0 => the universe doesn't expand

If it has an edge but you can't see it nor touch it, by definition of "existence", smt exists only if you can use any of your 5 senses to feel it.
=> it doesn't have an edge

[NuclearSilo]

interesting
how?

google, maybe

...

So because it had the size of a grain => the universe is finite

[Sav]

interesting
how?

google, maybe

...

So because it had the size of a grain => the universe is finite

you gotta be serious

universe today =/= grain of rice

[IceCrash]

i think nuclear's right
anything that exists has its opposite
something can only have a beggining if it has an end
we can't truly understand infinite things

[NuclearSilo]

interesting
how?

google, maybe

...

So because it had the size of a grain => the universe is finite

you gotta be serious

universe today =/= grain of rice

Mathematic demonstration:

universe(big bang) : finite
after 1s of explosion/expansion (or even after 0.000..1s): newsize - oldsize = d
d is the distance between the edges of the new and old universe.
because materials are ejected continuously in space, therefore d is finite and d = 1km exists, for example.
oldsize + 1km = newsize
oldsize + d = newsize
because 1km or d are both finite number => the sum is finite
=> newsize = finite

And because we know the time separated between today and the bigbang, call it t seconds, it's also a finite number.
newsize = oldsize + t*d
is also finite.

A simple example:
function size(t)
(t=0): size=0
(t=1): size=size+5=5
(t=2): size=size+5=10
(t=3): size=size+5=15
...
(t=today):size=size+5=size(0)+5*today)
because today is a known number and finite => size(today) is finite

i think nuclear's right
anything that exists has its opposite
something can only have a beggining if it has an end
we can't truly understand infinite things

That's one property of the existence. There's also always a limit/frontier/edge/whatever you call/ which delimits 2 opposite things.

[Krevidy]

The only way we will be able to ever leave the milkyway is the invention of FTL (Faster Than Light) drives, ironically they're called FTL drives, but what they actually do is de-form space and time, and make a wormhole from point A to point B.
But the problem with this kind of transport is, you will never know where you will end up, you might just as well end up in a star.

[Sav]

as far as i see/understand it, the universe could be measured with a finite number (if it was small enough) at a given period of time, but the universe is continuously expanding(or off/on), the distance measured today will definitely not be the same tomorrow, a week from now. (i spend 10 mins trying to think of a way to further expand on this...in words...but couldn't) >.<

[NuclearSilo]

And the only known distortion force

[Sav]

And the only known distortion force

use of force to bring together two different points would probably lead to dangerous outcomes, though the day someone finds a way for instant transmission to exist aside from this would possibly be the greatest discovery in science.

[[SD]happynoobing]

i thought this was a nuclearsilo question when i first saw the title.

[.Banshee]

The universe is infinite. It will keep expanding forever.

If smt could expand => It has a limit, an edge => the universe is finite => you contradict yourself.

On topic: it's as big as your imagination is

what he means to say is that the universe will either keep on expanding forever(like it's doing now) or it will fall upon itself into an infinitely small space resulting in the big crunch(lol possible reason why Big Bang happened???). Either way it's still bad news for life in the universe as the bigger the universe get's the farther away the sun is(will result in Ragnarok or death by ice)and if the universe get's infinitely smaller the closer the sun and other stars get(resulting in Armageddon, or death by fire).

Also about the super volcano, we are long overdue for an eruption but I doubt it will be in the same magnitude of the last eruption, as it hasn't fully formed yet. What has me worried(because I know alot of people that live on it) is the New Madrid fault line. Memphis and St. Louis are due for an earthquake and the longer it waits the stronger the earthquake is. If the earthquake does happen the US will fall into complete disorder as both Memphis and St. Louis are major system and the superhighway runs through Memphis and the earthquake will probably completely destroy both cities as most of the earthquakes that the Madrid Fault gives birth to are usually magnitude 8+.

[Sav]

The universe is infinite. It will keep expanding forever.

If smt could expand => It has a limit, an edge => the universe is finite => you contradict yourself.

On topic: it's as big as your imagination is

thinking about it, just because something expands doesn't mean it has to have a limit, and an "edge" would exist only if the substance expanding had a boundary to reach (as mentioned), transfer of different forms of energy can continue to create more matter(?), space, etc. like building an endless wall made of concrete, for which infinite concrete is made by transferred/conserved energy, or a infinite amount of a gas (created by change in phases/environment etc), in a simpler example, if and infinite amount of a liquid could be poured onto a tabletop with infinite length, that liquid would "expand" forever as long as no outside force was to affect it.

/bored

[Deadsolid]

Ok so after carefully not reading all the gibberish you responded with i recall what my physics teacher once told me...."by the time this knowledge is of any consequence, your body will have fertilized the earth".

Oh and "gravity always wins".

[NuclearSilo]

thinking about it, just because something expands doesn't mean it has to have a limit, and an "edge" would exist only if the substance expanding had a boundary to reach (as mentioned), transfer of different forms of energy can continue to create more matter(?), space, etc. like building an endless wall made of concrete, for which infinite concrete is made by transferred/conserved energy, or a infinite amount of a gas (created by change in phases/environment etc), in a simpler example, if and infinite amount of a liquid could be poured onto a tabletop with infinite length, that liquid would "expand" forever as long as no outside force was to affect it.

/bored

Did you copy paste from other site? -.-
"Expanding forever" is just a theory, sometime it could compress so it is finite. One object cannot possess both finite and infinite properties so it must be finite.
Moreover, ppl keep saying it is infinite just because they are incapable to unlock the unknown. It's rather a lack of knowledge than a true understanding of the size of the universe.
Take an example with a number
8
This number has a fixed (finite) size width as well as height. An ant moves along the edge of this number. Keep moving, moving, ... he cannot find the beginning nor the end. The universe could probably works the same way. It could be a sphere, a number 8, etc... and there is a force than fool us to make we think that we are watching straight when we look at the sky. Human watches using light. If light is curved, we'll never know

[Sav]

thinking about it, just because something expands doesn't mean it has to have a limit, and an "edge" would exist only if the substance expanding had a boundary to reach (as mentioned), transfer of different forms of energy can continue to create more matter(?), space, etc. like building an endless wall made of concrete, for which infinite concrete is made by transferred/conserved energy, or a infinite amount of a gas (created by change in phases/environment etc), in a simpler example, if and infinite amount of a liquid could be poured onto a tabletop with infinite length, that liquid would "expand" forever as long as no outside force was to affect it.

/bored

Did you copy paste from other site? -.-

no, based it on science program's i use to watch during boredom in high school years+some own ideas

[CrimsonNuker]

The first post is bigger than the universe.

[Bread_Fish]

for everyone saying faster than light travel is impossible

Code: Select all

we already can do it on a very small scale but as explained in the video its going to take time before we can do anything useful with it....luckily we have all the time in the universe

[Truie]

The universe is infinite. It will keep expanding forever.

If smt could expand => It has a limit, an edge => the universe is finite => you contradict yourself.

On topic: it's as big as your imagination is

your reasoning doesnt include relativity
if light speed is a constant, the universe isnt an object like a spoon or a fork:)

the center is everywhere
it can expand without there having anything beyond it : no edge.

remember space and time are contractable and dilatable in a relativistic perspective.

[NuclearSilo]

You seems to know much about relativity. So tell us how does light has anything to do with the universe? Light is just 0.00000...1% of the total elements that constructs the entire universe.

Strange, you always talk about the expansion but not about compression. When its size is reduced to 0 like in Big Bang, how could you still say it is infinite?

[Goseki]

You seems to know much about relativity. So tell us how does light has anything to do with the universe? Light is just 0.00000...1% of the total elements that constructs the entire universe.

Strange, you always talk about the expansion but not about compression. When its size is reduced to 0 like in Big Bang, how could you still say it is infinite?

Infinitely small. Infinity itself is a relative term. We call something infinite when there is no reasonable end to it. A ray starts at a given point and travels onward for infinity. The universe is only known relatively to us. At all times everything is expanding. If at some point everything starts to shrink, we wouldn't really notice it until it affected us, since everything would be expanding and shrinking at the same time. Think of it this way, if the universe was a sphere with a 1 km radius, and you are 6 ft tall at some point inside the sphere, if the area around you expanded 1 in, with you expanding the same, you wouldn't notice it, since it seems like nothing changed. Same if it is all compressed. The thing is though, at one point, all was a singularity, which meant everything was mushed together, although it is infinitely dense and tiny. Really a mind bender, but basically infinity can go either way, just imagine an atom, the more we know, the more it seems to be infinitely small, yet it's still much bigger than whatever lands into a black hole.

[Gaigemasta]

to get ot, and to answer the title

The universe is as big as my e-penis! /thread

[Crowley]

the universe is thiiiiiiiiiiiiiiiiiiis big

*stretches arms out*

[Gaigemasta]

the universe is thiiiiiiiiiiiiiiiiiiis big

*stretches arms out*

well thank u

[NuclearSilo]

Tsume are you asian?

@Goseki: if it expands or compresses and we can't notice it, then why bother to invent smt like Big Bang, coz the distance of stars inside always stay the same.

[ilililil]

once humans invent lightspeed engines it will be a long time until we conquer even our galaxy.

and those morons who say life exists only on earth need to go back to 9th grade. There is no way that among 10000000000000000 stars there isn't a planet that has similar characteristics as earth and has living things on it

i doubt humans will ever be able to invent an engine that can go at the speed of light let alone the human body even being able to handle such speeds

if ever it's possible to travel great distances, it would somehow have to be done with a wormhole/instant point-to-point, though making that into reality sounds even more ridiculous than a piece of machinery capable of light speed

The theory on worm hole sounds like suicide.
Here is why I say that, a worm hole is a black hole and a white hole combined.
The problem with this is a black hole pulls matter towards it while a white hole ejects the matter. So entering from the white hole is impossible and going through the black hole is suicidal. Here is how a black hole works. Go get a can soda pour the soda out place the can on your stove and heat it up. while that heats up get a large bowl and fill it full of water. Once the can is heated use a oven mitten and place the can in the water... the can will implode.
So the theory of a worm hole would result in being crushed due to pressure and then shit out through the white hole. And even if it doesn't crush you you'll more than likely be cooked going through the worm hole. Black holes sucks in heat due to thermal radiation.


I think rockets are the wrong route to go when dealing with space travel.
Copied from a forum* can't remember which one...
"The fastest a chemical rocket can push a spacecraft is about 41,000 MPH (65,983.104 kph or 18.32 Km per second), such as New Horizons. After Jupiter's gravity assist it will be going 47,000 MPH (75,639.168 kph) or 13.05 Miles per second!
http://www.theconservativevoice.com/art ... l?id=11379

The fastest unmanned spacecraft to date is Helios II at 254,276 kilometers per hour (70.63 Km per second), which translates to 158,000 MPH or about 44 miles per second!
http://www.nsbe.org/techcorner/maximumvelocity.php

The fastest manned spacecraft to date is Apollo 10 before re-entry at 24,759 mph (6.9 Miles per hour), which translates to 39,846 kilometers per hour (11.068 Km per second)!
http://www.nsbe.org/techcorner/maximumvelocity.php"

In order to reach light speed you would have to go
299,792,458 m/s

once humans invent lightspeed engines it will be a long time until we conquer even our galaxy.

and those morons who say life exists only on earth need to go back to 9th grade. There is no way that among 10000000000000000 stars there isn't a planet that has similar characteristics as earth and has living things on it

i doubt humans will ever be able to invent an engine that can go at the speed of light let alone the human body even being able to handle such speeds

people said the same thing about the modern monorail....

Everything that humans can imagine is a possibility in reality....

I agree on this.
This is the way I feel about the theory on the speed of light...
-For every Negative there is a Positive.
-For every Wrong there is a Right.
So no matter how impossible something may seem it is very possible!

PS: I don't believe the universe has an edge I think it's a bubble.

[Crowley]

Tsume are you asian?

why yes i am (half actually)

[NuclearSilo]

I agree on this.
This is the way I feel about the theory on the speed of light...
-For every Negative there is a Positive.
-For every Wrong there is a Right.
So no matter how impossible something may seem it is very possible!

PS: I don't believe the universe has an edge I think it's a bubble.

That's the way existence works, smt exists if only its opposite exists
I believe even for human, you can find a person 100% opposite from you.

once humans invent lightspeed engines it will be a long time until we conquer even our galaxy.

and those morons who say life exists only on earth need to go back to 9th grade. There is no way that among 10000000000000000 stars there isn't a planet that has similar characteristics as earth and has living things on it

i doubt humans will ever be able to invent an engine that can go at the speed of light let alone the human body even being able to handle such speeds

people said the same thing about the modern monorail....

Everything that humans can imagine is a possibility in reality....

I imagine about ghosts, and?