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Could dark matter not exist?

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Re: Could dark matter not exist?

#101
post #61

Earlier quoted context omitted.

Ditto. Out of curiosity, is dark matter spread unevenly throughout the universe, or is it directly inverse to matter? Like, when we expect dark matter causes an effect, is it because we expect there to be a massive dark-matter "object" acting upon matter, or can we attribute it to denser dark matter as space between matter increases? Edit: would viewing dark matter provide a negative image of the universe? I'm asking…

No, dark matter is definitely not the inverse of regular matter. Dark matter is spread unevenly through the universe, and it's spread in a pretty similar (but still notably different) way to the spread of regular matter. For example, where you have galaxies with lots of regular matter there is also lots of dark matter, but it has a slightly different distribution. You seem to be imagining something cool, but not some…

That's part of the problem with dark matter theory, isn't it? Theory predicts even and well distributed dark matter anti-particles, yet there isn't in the observable universe...

Re: Could dark matter not exist?

#102
post #61

Earlier quoted context omitted.

No, dark matter is definitely not the inverse of regular matter. Dark matter is spread unevenly through the universe, and it's spread in a pretty similar (but still notably different) way to the spread of regular matter. For example, where you have galaxies with lots of regular matter there is also lots of dark matter, but it has a slightly different distribution. You seem to be imagining something cool, but not some…

That's part of the problem with dark matter theory, isn't it? Theory predicts even and well distributed dark matter anti-particles, yet there isn't in the observable universe...

I'm not sure what you're referring to. I don't think the theoretical problems around antimatter are any worse for dark matter than they are for baryonic matter.
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