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Why do matter and antimatter annihilate? (bigthink.com)

submitted 4 months ago by [email protected] to c/[email protected]

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From forming bound states to normal scattering, many possibilities abound for matter-antimatter interactions. So why do they annihilate? There’s a quantum reason we simply can’t avoid.

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[–] [email protected] 1 points 4 months ago (1 children)

Don't colliding galaxies mostly not actually touch? I thought there's so much space between everything it's almost entirely gravitational interactions. I'd assume almost no huge annihilation events from that, or extremely low frequency.

[–] [email protected] 2 points 4 months ago

The stars and planets, yes, but there is a lot of very diffuse gas that does collide