What would the largest anti-matter object be?

[Nasher]

Any suggestions to what the largest anti-matter object would be?

Would it be just anti-particles, or would it be anti-hydrogen, or anti-carbon, larger anti-atoms, or multiple anti-atom object, or anti-one_kilogram object, or anti-planet,
or antistar, or anti-galaxy, or anti-cluster, or anti-universe?

 

[mathman]

It could be any of the items proposed. However, as far as actual existence is concerned, there isn't any evidence of any anti-matter except at the particle level or anti-hydrogen (created in laboratories).

 

[DaveC426913]

There are wild speculations that segments of the universe could contain whole antimatter galaxies. We wouldn't know it since photons are matter-antimatter agnostic.

But it is exceedingly unlikely.

 

[mathman]

There are wild speculations that segments of the universe could contain whole antimatter galaxies. We wouldn't know it since photons are matter-antimatter agnostic.

But it is exceedingly unlikely.

Immediately after the big bang, the universe was much more crowded, so it is highly unlikely that anti-matter could have been segregated from matter.

 

[setAI]

Immediately after the big bang, the universe was much more crowded, so it is highly unlikely that anti-matter could have been segregated from matter.

I think the segregation is supposed to have occurred during rapid inflationary epochs

 

[mathman]

I think the segregation is supposed to have occurred during rapid inflationary epochs

Thigs were flying around so fast, it is hard to see that anything could segregate.

 

[Chronos]

It is highly unlikely macroscopic amounts of anti-matter [more than atomic particle sized] exist within our universe. There is no viable mechanism explaining how they became segregated. Were they not segregated, life on Earth would be difficult to explain. This is a fairly significant mystery in any cosmological model. There is no mechanism to explain the disparity, but an abundance of evidence exists suggesting the disparity is real.

 

[keinve]

nearly impossible for there to be large ammounts of anitmatter.