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That's pretty much it
If you "heat" an atom it will start to lose it's electrons and form an ionised gas called a plasma.
We know how big the Universe is and how hot it is Cosmic microwave Background mentioned above.
Run the expansion of the Universe back and that energy is compressed inro a smaller and smaller space and you reach a temperature about 300,000 years or so after where it is too hot for atoms to be stable
If you "heat" an atom it will start to lose it's electrons and form an ionised gas called a plasma.
We know how big the Universe is and how hot it is Cosmic microwave Background mentioned above.
Run the expansion of the Universe back and that energy is compressed inro a smaller and smaller space and you reach a temperature about 300,000 years or so after where it is too hot for atoms to be stable
Not that gets complex Brisayshi because our Universe isn't necessarilly just the 4 dimensions that we experience.
There are a set of equations called the Einstein Field equations that describe the shape of the Universe and how it is expanding.
These have a number of possible solutions many involving several dimensions.
One particularly interesting possibility is that if you could shoot off in one direction you'd get back to where you started - a bit like the Asteroids game if you remember that only in 3 dimensions.
In two dimensions for that behaviour you need a 3 dimensional sphere like the Earth.
In three dimensions you need a 4 dimensional torus (or doughnut shape).
It's very difficult to imagine higher dimensions if you are willing to risk a headache you might just manage a 4D shape
However that doesn't stop maths being able to handle it.
If you want to know the distance between two points in 2D you just use pythagorus
x²+y²=distance² (easy)
3D it's just the same x²+y²+z²=distance²
Lets work out the distance between 2 points in 6 dimensions
a²+b²+c²+d²+e²+f²=distance²
You're now doing multi-dimensional mathematics - take a bow!
There are a set of equations called the Einstein Field equations that describe the shape of the Universe and how it is expanding.
These have a number of possible solutions many involving several dimensions.
One particularly interesting possibility is that if you could shoot off in one direction you'd get back to where you started - a bit like the Asteroids game if you remember that only in 3 dimensions.
In two dimensions for that behaviour you need a 3 dimensional sphere like the Earth.
In three dimensions you need a 4 dimensional torus (or doughnut shape).
It's very difficult to imagine higher dimensions if you are willing to risk a headache you might just manage a 4D shape
However that doesn't stop maths being able to handle it.
If you want to know the distance between two points in 2D you just use pythagorus
x²+y²=distance² (easy)
3D it's just the same x²+y²+z²=distance²
Lets work out the distance between 2 points in 6 dimensions
a²+b²+c²+d²+e²+f²=distance²
You're now doing multi-dimensional mathematics - take a bow!
what is the universe expanding into? thats a damn fine question and one makes my mind twitch. The universe isnt - and stop me if you reckon different- isnt actually expanding, its stretching. so the question actually is 'whats it stretching into'? Seeings as wecant detect anything beyond the universe we are a bit stuck. I like the stretching into another dimension concept - a framework of dimensions being a 'mathamatically possible way of stretching' as opposed to a space into which it stretches. As one chap said once the universe is like i massive equation, and the answer is 42.
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