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> Intergalactic void is so empty that next galaxy could be made of anti-matter (it probably isn't) and we couldn't tell. But not completely empty and we should
by outworlder 10y ago
> Intergalactic void is so empty that next galaxy could be made of anti-matter (it probably isn't) and we couldn't tell.
But not completely empty and we should be able to detect matter-antimatter annihilations.
- scotty79 10y agoMight be hard from half of the universe away. We don't know how close is the nearest antimatter area of universe. Galaxies can have gamma halos. It might be that intergalactic void is more egalitarian when it comes to matter-antimatter and it shows.