AskPhysics

446 readers

13 users here now

founded 1 year ago

MODERATORS

[email protected]

If the Andromeda galaxy were made of antimatter, would we know? What about more distant objects? (sh.itjust.works)

submitted 5 months ago by [email protected] to c/[email protected]

3 comments fedilink hide all child comments

My understanding is that "what happened to the antimatter?" is a bit of an open question. How sure are we that all of the matter we can see is in fact matter, and not antimatter?

Antimatter has the same mass, electromagnetic spectra, falls down, etc. Do we have a way of determining which version of matter distant objects are made of?

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 4 points 5 months ago

My understanding is that antimatter "looks" just like matter. https://www.sciencealert.com/physicists-have-observed-the-light-spectrum-of-antimatter-for-first-time

permalink
fedilink
source