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technobot
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In my thread regarding the telescopic detection of antimatter, it was concluded that we cannot discern anti-matter from matter when observing it via telescope. As a follow-up, I have another question - or rather a few tightly connected questions:
If we cannot tell the difference when looking at it, how do we know that some of the other galaxies, or maybe even some areas in our own galaxy, are not predominantly made of antimatter (I'm ignoring other possible ingredients such as dark matter)? Has any research been done to check this, at least on the level of a mathematical model? What sort of phenomena would we expect to observe if this was the case, if any?
And for that matter (pun not intentional), how do we know that there is in fact an imbalance on the universal scale? What evidence do we have of this? Could it not be only a local imbalance, in principle? [Note of clarification: I am not asking how we know that the imbalance exists. Clearly, we are here, so it must exist. What I'm asking is how do we know it's on a universal scale, rather than local. Or rather - how do we know it's the same everywhere?]
[Please forgive the somewhat speculative nature of this post. I am not trying to propose any new "theories". I merely wish to discuss the current mainstream understanding of this issue.]
If we cannot tell the difference when looking at it, how do we know that some of the other galaxies, or maybe even some areas in our own galaxy, are not predominantly made of antimatter (I'm ignoring other possible ingredients such as dark matter)? Has any research been done to check this, at least on the level of a mathematical model? What sort of phenomena would we expect to observe if this was the case, if any?
And for that matter (pun not intentional), how do we know that there is in fact an imbalance on the universal scale? What evidence do we have of this? Could it not be only a local imbalance, in principle? [Note of clarification: I am not asking how we know that the imbalance exists. Clearly, we are here, so it must exist. What I'm asking is how do we know it's on a universal scale, rather than local. Or rather - how do we know it's the same everywhere?]
[Please forgive the somewhat speculative nature of this post. I am not trying to propose any new "theories". I merely wish to discuss the current mainstream understanding of this issue.]
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