Impaler wrote: I find it hard to imagine this thought has not occurred to cosmologists before and been studied.
It’s not at all a hard thing to test if sensitive instruments are used, tiny amounts of anti-matter have been created in accelerators but I don’t believe any attempt has ever been made to weigh it. This is probably a good test to run just to make absolutely certain were not missing some hugely important piece of the picture.
It has been imagined, but in fact it is extraordinarily difficult to study, because only single atoms of anti-hydrogen have thus far been created; and forces that would be able to contain antimatter for study are many many orders of magnitude stronger than gravity itself.
