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Antimatter


ydoaPs

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I have always been told that there is mostly matter in the universe(compared to antimatter). How does anyone know? They say if there was, there would be buffer zones. I thought there are rediculous distances betwenn heavenly bodies, so why couldn't there be antimatter galaxies?

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There is a thoey of galaxies and antigalaxies, but the problem is that there is no way to prevnt the matter from galaxies and antigalxies meeting; there would always be a zone between galaxy and an adjacent antigalaxy where matter from the two would meet and anihilate leading to the emisson of gamma rays in huge quantities. No such zones are observed between galaxies.

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yourdadonapogos, the void between galaxies still has matter in it, not much but some. If there were antimatter zones in the universe then there would be boundaries where the zones 'met' normal matter and thus, annilated the matter generating lots of energy. While the idea is not impossible it is highly improbable, as in our extensive surveying of the universe we have not found any of areas generating this energy seemingly from no where.

 

There is also the notion that the universe was once much much smaller and an abundance of antimatter wouldn't have left much for us to observe today(or enough to create us to observe this fact).

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Background radiation is too uniform to be a result of matter/antimatter collisions. It is also too cold (a mere 2.7K) and at the wrong wavelength (microwaves) to be explained via this process.

 

The source of the background radiation is the afterglow of the big bang. We can say this with a fair degree of confidence because its temperature/distribution/wavelength match well with other estimations of the age/size of the universe.

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Background radiation is too uniform to be a result of matter/antimatter collisions. It is also too cold (a mere 2.7K) and at the wrong wavelength (microwaves) to be explained via this process.

 

The source of the background radiation is the afterglow of the big bang. We can say this with a fair degree of confidence because its temperature/distribution/wavelength match well with other estimations of the age/size of the universe.

 

 

how COULD it be? logic would dictate it is impossible. energy travels at c, matter deosn't. i have never understood why people thought that it is from big bang.

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then how the bloody hell did we get in front of it???????????????

 

radiation was created before matter. radiation travels faster than matter. we should not be able to see radiation from the big bang.

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then how the bloody hell did we get in front of it???????????????

 

radiation was created before matter. radiation travels faster than matter. we should not be able to see radiation from the big bang.

 

For a global event such as recombination (which is where the radiation comes from 300,000yrs after the BB), we should always be able to see the radiation. The radiation is far too homogenous to come from the anihilation of matter and antimatter and it is alos of the wrong wavelngh.

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