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submitted 11 months ago by L4s@lemmy.world to c/technology@lemmy.world

An extremely high-energy particle is detected coming from an apparently empty region of space::Amaterasu particle, one of highest-energy cosmic rays ever detected, is coming from an apparently empty region of space

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[-] Buddahriffic@lemmy.world 6 points 11 months ago

When they say "local void", do they mean like a cone extending in that direction with nothing behind it or a space with nothing inside it but stuff behind it?

If it's the former, what is going on with that?

If it's the latter, couldn't this have traveled from one of the things behind it?

[-] luthis@lemmy.nz 6 points 11 months ago

If it’s the former, what is going on with that?

If you look at the universe structure, it's not entirely implausible to have some straight lines that don't intersect any bodies of mass, depending on how far back in time you're looking.

https://duckduckgo.com/?t=ffab&q=universe+structure&ia=web

If it’s the latter, couldn’t this have traveled from one of the things behind it?

Only if that thing is/was ahead of the lightspeed/space expansion event horizon.

[-] MonkderZweite@feddit.ch 3 points 11 months ago* (last edited 11 months ago)

This is what our area probably looks like on really grand scale (every dot is a galaxy). The local void is one of the dark areas next to us.

this post was submitted on 25 Nov 2023
237 points (97.6% liked)

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